Best 6 Sigma in 2026

Last Updated: Sep 27, 2023

At a Glance: Our Top Picks

Predator 212 cc Engine Hemi & non Hemi Performance 4 Stroke Go Kart Mini Racing MicroBurst NOS Nitro Nitrous Oxide Injection Kit with Carb Jet Upgrade
#TOP1
Predator 212 Cc Engine Hemi & Non Hemi
6.5
PM SCORE
Offroad Go Kart Cart Dune Buggy Sand Rail 250 125 cc NO2 NOS Nitrous Oxide Kit
#TOP2
Offroad Go Kart Cart Dune Buggy Sand Rail
4.7
PM SCORE
Polaris RZR 4 800 RZR800 Front Center Prop Drive Shaft Carrier Support Bearing Greasable
#TOP3
Polaris Rzr 4 800 Rzr800 Front Center Prop
4.6
PM SCORE

* PickSmartly editors independently research, review, and endorse the top products through comprehensive data analysis. We may earn a commission for qualifying purchases made through our product links.

Summary of the best 6 Sigma of 2026

Predator 212 Cc Engine Hemi & Non Hemi Performance 4 Stroke Go Kart Mini Racing Microburst Nos Nitro Nitrous Oxide Injection Kit With Carb Jet Upgrade

6 SIGMA
6SIG3525
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
6 Sigma 5.41

Features

Nitrous Oxide (NOS) is the simplest, least expensive way, to provide a significant horsepower boost to your engine, and add performance you can feel in the seat.

More Peak Horsepower - Designed to gain 20% in Horsepower at Wide Open Throttle

More Low End Torque - Torque gains are even greater as there is an increased combustion at a lower rpm range and causes the significant improvement in acceleration.

Low Cost, High Performance - Nitrous offers you more performance per dollar spent, than any other performance modification.

Easy Installation - 6 Sigma N20 installations are very easy, literally only taking a few minutes with basic hand tools to install. No wiring needed.

Offroad Go Kart Cart Dune Buggy Sand Rail 250 125 Cc No2 Nos Nitrous Oxide Kit

6 SIGMA
6SIG3524
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
6 Sigma 5.41

Features

Nitrous Oxide (NOS) is the simplest, least expensive way, to provide a significant horsepower boost to your engine, and add performance you can feel in the seat.

More Peak Horsepower - Designed to gain 20% in Horsepower at Wide Open Throttle

More Low End Torque - Torque gains are even greater as there is an increased combustion at a lower rpm range and causes the significant improvement in acceleration.

Low Cost, High Performance - Nitrous offers you more performance per dollar spent, than any other performance modification.

Easy Installation - 6 Sigma N20 installations are very easy, literally only taking a few minutes with basic hand tools to install. No wiring needed.

Polaris Rzr 4 800 Rzr800 Front Center Prop Drive Shaft Carrier Support Bearing Greasable

6 SIGMA
2878336 - 3514703
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
6 Sigma 5.41

Features

Greasable FRONT CENTER Drive Shaft SUPPORT BEARING

Does NOT Fit Ranger

On some years longer bolts are needed

Fit RZR 4 800

Small Engine Nos No2 Nitrous Oxide Kit 250-500 2 & 4 Stroke, Efi & Carb +5 Bottles Of Nos …

6 SIGMA
6SIG3118
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
6 Sigma 5.41

Features

Nitrous Oxide (NOS) is the simplest, least expensive way, to provide a significant horsepower boost to your engine, and add performance you can feel in the seat.

More Peak Horsepower - Designed to gain 20% in Horsepower at Wide Open Throttle

More Low End Torque - Torque gains are even greater as there is an increased combustion at a lower rpm range and causes the significant improvement in acceleration.

Low Cost, High Performance - Nitrous offers you more performance per dollar spent, than any other performance modification.

Easy Installation - 6 Sigma N20 installations are very easy, literally only taking a few minutes with basic hand tools to install. No wiring needed.

Small Engine Nos No2 Nitrous Oxide Kit 49-250 2 & 4 Stroke, Efi & Carb +5 Bottles Of Nos

6 SIGMA
6SIG3977
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
6 Sigma 5.41

Features

Nitrous Oxide (NOS) is the simplest, least expensive way, to provide a significant horsepower boost to your engine, and add performance you can feel in the seat.

More Peak Horsepower - Designed to gain 20% in Horsepower at Wide Open Throttle

More Low End Torque - Torque gains are even greater as there is an increased combustion at a lower rpm range and causes the significant improvement in acceleration.

Low Cost, High Performance - Nitrous offers you more performance per dollar spent, than any other performance modification.

Easy Installation - 6 Sigma N20 installations are very easy, literally only taking a few minutes with basic hand tools to install. No wiring needed.

Gy6 Bike Scooter Atv 50 100 125 150 Cc Nos Nitrous Oxide & Boost Bottle Kit

6 SIGMA
6SIG3263
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
6 Sigma 5.31

Features

Nitrous Oxide (NOS) is the simplest, least expensive way, to provide a significant horsepower boost to your engine, and add performance you can feel in the seat.

More Peak Horsepower - Designed to gain 20% in Horsepower at Wide Open Throttle

More Low End Torque - Torque gains are even greater as there is an increased combustion at a lower rpm range and causes the significant improvement in acceleration.

Low Cost, High Performance - Nitrous offers you more performance per dollar spent, than any other performance modification.

Easy Installation - 6 Sigma N20 installations are very easy, literally only taking a few minutes with basic hand tools to install. No wiring needed.

Small Engine Nos No2 Nitrous Oxide Kit 250-500 2 & 4 Stroke, Efi & Carb +5 Bottles Of Nos

6 SIGMA
6SIG3106
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
6 Sigma 5.41

Features

Nitrous Oxide (NOS) is the simplest, least expensive way, to provide a significant horsepower boost to your engine, and add performance you can feel in the seat.

More Peak Horsepower - Designed to gain 20% in Horsepower at Wide Open Throttle

More Low End Torque - Torque gains are even greater as there is an increased combustion at a lower rpm range and causes the significant improvement in acceleration.

Low Cost, High Performance - Nitrous offers you more performance per dollar spent, than any other performance modification.

Easy Installation - 6 Sigma N20 installations are very easy, literally only taking a few minutes with basic hand tools to install. No wiring needed.

Motorized Bicycle Gas Bike Motor Engine 50 80 Cc Nos Nitrous & Boost Bottle Kit

6 SIGMA
6SIG3511
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
6 Sigma 5.41

Features

Nitrous Oxide (NOS) is the simplest, least expensive way, to provide a significant horsepower boost to your engine, and add performance you can feel in the seat.

More Peak Horsepower - Designed to gain 20% in Horsepower at Wide Open Throttle

More Low End Torque - Torque gains are even greater as there is an increased combustion at a lower rpm range and causes the significant improvement in acceleration.

Low Cost, High Performance - Nitrous offers you more performance per dollar spent, than any other performance modification.

Easy Installation - 6 Sigma N20 installations are very easy, literally only taking a few minutes with basic hand tools to install. No wiring needed.

Predator 420 Nox Nitrous Oxide Nos Kit W/ 5 Full Nitrous Bottles Include

6 SIGMA
6SIG2902
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
6 Sigma 5.41

Features

Nitrous Oxide (NOS) is the simplest, least expensive way, to provide a significant horsepower boost to your engine, and add performance you can feel in the seat.

More Peak Horsepower - Designed to gain 20% in Horsepower at Wide Open Throttle

More Low End Torque - Torque gains are even greater as there is an increased combustion at a lower rpm range and causes the significant improvement in acceleration.

Low Cost, High Performance - Nitrous offers you more performance per dollar spent, than any other performance modification.

Easy Installation - 6 Sigma N20 installations are very easy, literally only taking a few minutes with basic hand tools to install. No wiring needed.

Pagsta Mini 49 Choppa 97 Cruisa 250 Cc Intake Air Filter Nos Nitrous Oxide Kit

6 SIGMA
6SIG3530
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
6 Sigma 5.41

Features

Nitrous Oxide (NOS) is the simplest, least expensive way, to provide a significant horsepower boost to your engine, and add performance you can feel in the seat.

More Peak Horsepower - Designed to gain 20% in Horsepower at Wide Open Throttle

More Low End Torque - Torque gains are even greater as there is an increased combustion at a lower rpm range and causes the significant improvement in acceleration.

Low Cost, High Performance - Nitrous offers you more performance per dollar spent, than any other performance modification.

Easy Installation - 6 Sigma N20 installations are very easy, literally only taking a few minutes with basic hand tools to install. No wiring needed.

Nitrous Express Ml15600 Nitrous Purge Valve Kit -04An Manifold Adapter Fitting Push Button Activation Vent Tube Nitrous Purge Valve Kit

NITROUS EXPRESS
ML15600
0.00 X 0.00 X 0.00 Inches
0.60 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
EZ Automotive 9.24

Features

Fit type: Vehicle Specific

Package Dimensions: 3.9 L x 18.0 H x 11.3 W (centimeters)

Made in United States

Package Weight : 0.8 pounds

Dracary Duty Fully Automatic Nitrous Bottle Heater Flexible Heating Element Fits 10Lb,15Lb,20Lb (12Volt)

DRACARY
DY-ANGA
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
FIRELOOP Manufacturer 7.87

Features

Silicone material ,Heating fast,easy installation;Specifications:length:15 4/5inch width:6inch

Thermostatically controlled to ensure optimum bottle temperature

Fit for :10LB,15LB,20LB Applicable voltage:12volt

Calibrated for specific pressure ranges, maximum horsepower and consistent nitrous flow for engine safety

The heater does not include the relay switch nor the automatic heating sensor.【Please see our store other products】

Dracary Nitrous Bottle Nut Adapter With Washer (Blue, 6An)

DRACARY
DY-ANGA
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
FIRELOOP Manufacturer 7.78

Features

Dracary Nitrous bottle nut adapters are designed to thread onto your nitrous bottle and will accept your AN braided stainless steel nitrous pressure line.

They are manufactured from durable steel to withstand high nitrous bottle pressures.

Made from steel with a nickel plated finish for durability; ;Keeps contaminants out of your nitrous system

90day limited warranty

Fitting Attachment:Female threads

#TOP14

Nitrous Bottle Nut Adapter With Washer (Blue, 4An)

DRACARY
DY-ANGA
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
FIRELOOP Manufacturer 7.92

Features

Dracary Nitrous bottle nut adapters are designed to thread onto your nitrous bottle and will accept your AN braided stainless steel nitrous pressure line.

They are manufactured from durable steel to withstand high nitrous bottle pressures.

Made from steel with a nickel plated finish for durability; 90day limited warranty;Keeps contaminants out of your nitrous system

Fitting Attachment:Female threads

Nitrous Bottle Nut Adapter With Washer (Blue, 4AN)

Dracary Duty Fully Automatic Nitrous Bottle Heater Flexible Heating Element Fits 10Lb,15Lb,20Lb (120 Ac Voltage 400W)

DRACARY
DRACARY
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
FIRELOOP Manufacturer 7.13

Features

Silicone material ,Heating fast,easy installation

Thermostatically controlled to ensure optimum bottle temperature

Fit for :10LB,15LB,20LB Applicable voltage:120 AC Voltage 400W

Calibrated for specific pressure ranges, maximum horsepower and consistent nitrous flow for engine safety

Specifications:length:15 3/4 inch width:6 inch

20 Pcs Carburetor Jets Kit With 10 Pcs Main Jets # 155 158 160 162 165 168 170 172 175 178 And 10 Pcs Slow Jets # 32 35 38 40 42 45 48 50 52 55 For Keihi Oko Koso Pe Pwk Carb

APEIXOTO
AP1048K
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
AUTOLINE 9.74

Features

Application: This main jet and slow pilot jet kit is a direct replacement for Keihin, FCR, KOSO, OKO, PWK, PE and some special version carburetor.

Package Includes: There are 20 pieces units in the package, including 10 piece slow pilot jets and 10 piece main jets.

Detail Specification:The size of the 10pcs main jets are 155, 158, 160, 162, 165, 168, 170, 172, 175, 178, . And the size of the 10pcs slow pilot jets are 32, 35, 38, 40, 42, 45, 48, 50, 52, 55

Dimension: The overall length of the main jet is 16.5mm, the thread length is 5mm, the cap length is 11.5mm. The ptich is 5mm*0.8mm and the net diameter is 6mm. The overall length of the slow pilot jet is 28mm, the thread size is 6mm*0.75mm, teh nut diameter is 5mm.

Warranty: 100% satisfaction. These main jet and slow pilot jet kit are totally brand new. If you need any assists during usage, feel free to ask

Nitrous Bottle Nut Adapter With Washer (Black, 4An)

DRACARY
DY-ANGA
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
FIRELOOP Manufacturer 7.78

Features

Fitting Attachment:Female threads

Dracary Nitrous bottle nut adapters are designed to thread onto your nitrous bottle and will accept your AN braided stainless steel nitrous pressure line.

They are manufactured from durable steel to withstand high nitrous bottle pressures.

Made from steel with a nickel plated finish for durability; 90day limited warranty;Keeps contaminants out of your nitrous system

Nitrous Bottle Nut Adapter With Washer (BLACK, 4AN)

5Mm Thread Carburetor Main Jet (12 Pieces/Pack) For Dellorto Sha Carb And Phbg Ad/Ds Racing Main Injector Nozzle Pilot Jet (A Set)

FA.CBJ3
QE-88
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Star Starshine 5.05

Glowshift 10 Color Digital 1,600 Psi Nitrous Pressure Nos Gauge Kit - Includes Electronic Sensor - Multi-Color Led Display - Tinted Lens - 2-1/16" (52Mm)

GLOWSHIFT
GS-TCD14
0.00 X 0.00 X 0.00 Inches
0.80 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
GlowShift Gauges, LLC 9.81

Features

GlowShift 10 Color Digital Series Nitrous Pressure Gauge Displays the Amount of Nitrous Oxide in the Bottle of Your Nitrous System

NOS Pressure Readings from 0 to 1,600 PSI - 2-1/16" (52mm) Gauge with Digital Display & Tinted Lens

Quick-Glance & Easy to Read Digital Display - 10 Solid Color Modes & 2 Color Cycle Modes - Self-Calibration at Startup Ensures that the Gauge is Performing Optimally

Includes 1/8-27 NPT Pressure Sensor, 9' Sensor Harness, 2' Power Harness, Gauge Visor, Mounting Hardware & Installation Instructions

GlowShift Guarantee with One Year Limited Warranty & Free Lifetime Technical Support

Predator 212 Cc Engine Hemi & Non Hemi Performance 4 Stroke Go Kart Mini Racing Microburst Nos Nitro Nitrous Oxide Injection Kit With Carb Jet Upgrade

6 SIGMA
6SIG3525
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
6 Sigma 5.41

Features

Nitrous Oxide (NOS) is the simplest, least expensive way, to provide a significant horsepower boost to your engine, and add performance you can feel in the seat.

More Peak Horsepower - Designed to gain 20% in Horsepower at Wide Open Throttle

More Low End Torque - Torque gains are even greater as there is an increased combustion at a lower rpm range and causes the significant improvement in acceleration.

Low Cost, High Performance - Nitrous offers you more performance per dollar spent, than any other performance modification.

Easy Installation - 6 Sigma N20 installations are very easy, literally only taking a few minutes with basic hand tools to install. No wiring needed.

Nitrous Express 15600 Nitrous Purge Valve Including D-4 Manifold, Push Button And Vent Tube

NITROUS EXPRESS
15600
9.00 X 6.00 X 2.00 Inches
0.05 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Includes a Lightning purge solenoid and a D-4 manifold, push button and vent tube

Purge valve is incorporated to add to the performance of your existing system

Allows harder launches and quicker 60 feet times

Can shave up to 2 tenths off of your quarter mile ETs

Innovate Motorsports 3893 38930 Psn-1: Powersafe Nitrous Bottle Pressure & Wideband Air/Fuel Ratio Gauge Kit

INNOVATE MOTORSPORTS
3893
11.42 X 5.91 X 2.36 inches
1.54 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
SG MARKETPLACE 9.59

Features

All-in-one, Nitrous safety override and wideband air/fuel ratio gauge w/RPM window switch, 52mm (2 1/6") diameter gauge body

OLED user configurable display. Nitrous Bottle Press., shift light, Air/Fuel ratio. AFR or Lambda, inHg, PSI, kPa, or BAR

1500 PSI nitrous bottle pressure sensor

User programmable nitrous safety cut using Air/Fuel ratio and bottle pressure references. Nitrous cut by lean air/fuel condition. Nitrous cut by minimum bottle pressure

User programmable RPM window switch range, 10 RPM increments

Innovate 38930

Nitrous Express 16008 Maximizer 5 Progressive Controller Incl. Internal Drivers For Stage One And Stage Two Operates Up To 4 Separate Stages Of Nitrous Maximizer 5 Progressive Controller

NITROUS EXPRESS
16008
8.00 X 5.50 X 3.00 Inches
1.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
AsaPerformance direct 9.44

Features

Nitrous Express 16008 Maximizer 5 Progressive Controller; Incl. Internal Drivers For Stage One And Stage Two; Operates Up To 4 Separate stages Of Nitrous;

Nitrous Express

16008

Warranty: Yes

Nitrous Express Ml15601 Nitrous Purge Valve Kit -06An Manifold Adapter Fitting Push Button Activation Vent Tube Nitrous Purge Valve Kit

NITROUS EXPRESS
ML15601
0.00 X 0.00 X 0.00 Inches
0.60 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Fit type: Vehicle Specific

Package Dimensions: 3.8 L x 18.0 H x 11.4 W (centimeters)

Made in United States

Package Weight : 0.8 pounds

Nos 13700Bnos Fogger2 Black Standard Nozzle

NOS/NITROUS OXIDE SYSTEM
13700BNOS
0.00 X 0.00 X 0.00 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Trends Auto 9.83

Features

Manufactured from brass for durability

Features a stamped NOS logo and tags for fuel and nitrous identification during installation and jet changes

Injection at a 90-degree angle

90-day limited warranty

Brass w/ Black Finish

Nitrous Express 11100 Nitrous Bottle With Standard L45 Valve - 10 Lbs.

NITROUS EXPRESS
11100
8.00 X 8.00 X 20.00 Inches
14.63 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
AsaPerformance direct 9.44

Features

Bottle is constructed from aluminum and has dimensions of 6.89 inch diameter and 20.19 inch length

Tough and attractive finish

Includes a high flow bottle valve

These bottles make designing of the system easy

Nitrous Express 20421-15 Proton Plus Nitrous System With 15 Lbs. Bottle

NITROUS EXPRESS
2042115
0.00 X 0.00 X 0.00 inches
24.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
AsaPerformance direct 9.44

Features

Black anodized aluminum housing pulls heat away from the solenoids for extreme durability

High quality solenoids capable of producing 150 horsepower to the wheels

Combines performance, durability and value in a compact and easy to mount module

Includes jetting for 35 horsepower, 50 horsepower, 75 horsepower, 100 horsepower, 125 horsepower and 150 horsepower and a single Shark nozzle

Fits all electronic fuel injected vehicles with a single throttle body; includes nozzle adapter, stainless braided nozzle lines, extra long braided stainless feed line, stainless fuel line, master arming switch

Nitrous Express 20934-10 90Mm Efi Nitrous Kit With 4-Bolt Plate For Gm Ls Engine

NITROUS EXPRESS
FBA_20934-10
0.00 X 0.00 X 0.00 inches
22.00 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
AsaPerformance direct 9.44

Features

Nitrous Express Nitrous Oxide Injection System Kit 20934-10

Nitrous Express 15601 Nitrous Purge Valve Including D-6 Manifold, Push Button And Vent Tube

NITROUS EXPRESS
15601
9.00 X 6.00 X 2.00 Inches
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Includes a Lightning purge solenoid and a D-4 manifold, push button and vent tube

Purge valve is incorporated to add to the performance of your existing system

Allows harder launches and quicker 60 feet times

Can shave up to 2 tenths off of your quarter mile Ets

Magnafuel Nitrous Oxide Fuel Pressure Regulator Kit, Two Regulators, Fuel Block, Aluminum, Blue/Purple Anodized, Single 4-Barrel Carbs, Kit (Mp-9540)

MAGNAFUEL
MP-9540
108.00 X 108.00 X 60.00 Inches
2.50 Pounds
SELLER SELLER SCORE AMAZON FULFILLED PRIME FREE SHIPPING
Amazon.com 9.68

Features

Package Dimensions: 9.0 L x 5.0 H x 9.0 W inches

Package Weight : 2.5 pounds

Country of Origin : United States

Part number: MP-9540

Fit type: Vehicle Specific

6 Sigma on Amazon: A Comprehensive Review

As an online shopper, it's crucial to make informed decisions. This review will focus on 6 Sigma, a brand that has made its presence felt on Amazon. With its wide range of products in Powersports Nitrous Kits, 6 Sigma has become a go-to for many shoppers.

Product Range

6 Sigma offers a vast product count of 98 items. This diverse selection caters to a wide array of needs and preferences, making it a versatile brand for consumers.

Quality and Pricing

Quality is a defining factor for any brand. Based on customer feedback and ratings, 6 Sigma's products have an average rating of 2.6 out of 10, indicating a high level of customer satisfaction.

When it comes to pricing, 6 Sigma has products ranging from a minimum price of $10.69 to a maximum of $3,988.37, with an average price of $894.08. This pricing structure caters to a wide range of budgets, making 6 Sigma an accessible choice for many shoppers.

Customer Service

Customer service is the backbone of any successful online brand. 6 Sigma is sold by 6 sigma, who are known for their commitment to customer satisfaction. They have been responsive and helpful, according to customer reviews and feedback.

Shopping Experience

The shopping experience on Amazon with 6 Sigma has been largely positive. The brand's wide range of products, combined with the ease of navigation on Amazon, has made shopping a breeze for many customers.

Delivery and Packaging

Delivery and packaging are yet another aspect where 6 Sigma shines. Items are delivered in a timely manner and the packaging ensures the products reach the customers in pristine condition.

Conclusion

In conclusion, 6 Sigma offers a wide range of quality products at varying price points, making it a brand worth considering for your next Amazon purchase. Their commitment to customer service, combined with a seamless shopping experience, makes 6 Sigma stand out in the crowded Amazon marketplace.

Overall Rating

Based on the analysis of product range, quality, pricing, customer service, shopping experience, and delivery, we rate 6 Sigma [2.6 out of 10 stars].