K&N 81-0812 Oil Separator Catch Can — Fits 20-25 GM 2500/3500 6.6L

SKU: KNN81-0812
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About K&N Engineering

K&N has been the world's leader in washable, reusable performance air filters since 1969. From the legendary cone filter to complete cold-air intake systems, K&N's cotton-gauze element delivers more airflow than paper while staying serviceable for the life of the vehicle.

K&N Performance Oil Separator Catch Can (81-0812) for GM Trucks

Safeguard your engine's performance and longevity with the K&N 81-0812 Air Oil Separator Catch Can, specifically designed for 2020-2025 Chevrolet Silverado 2500/3500 HD and GMC Sierra 2500/3500 HD models equipped with the 6.6L engine. This essential component captures oil and moisture from the blow-by gasses in your engine's crankcase, preventing them from entering the intake system and causing potential damage or performance degradation.

Why Choose the K&N 81-0812 Catch Can?

  • Engine Protection: Effectively traps oil particles and moisture, preventing them from contaminating your intake manifold and intercooler.
  • Performance Preservation: By keeping the intake system clean, it helps maintain optimal engine performance and fuel efficiency.
  • Reduced Oil Consumption: Minimizes the amount of oil that gets recirculated back into the combustion chamber.
  • Easy Installation: Features a quick, 30-minute installation process using basic tools and factory-style connectors.
  • High-Capacity Reservoir: The large reservoir makes checking and emptying the collected oil simple and infrequent.
  • Vehicle Specific Design: Engineered to fit seamlessly into the engine bay of your compatible GM truck.
  • Lifetime Warranty: Backed by K&N's No-Hassle Lifetime Limited Warranty for peace of mind.

The K&N Air Oil Separator is a crucial upgrade for any truck owner looking to protect their investment. By installing this catch can, you actively combat the harmful effects of blow-by, ensuring your 6.6L Duramax engine runs cleaner and stronger for years to come. Invest in superior engine protection with GGCRACING.

Vehicle Fitment

Years Make Model Trim
2020-2025 Chevrolet Silverado 2500 HD Custom
2020-2025 Chevrolet Silverado 2500 HD High Country
2020-2025 Chevrolet Silverado 2500 HD LT
2020-2025 Chevrolet Silverado 2500 HD LTZ
2020-2025 Chevrolet Silverado 2500 HD WT
2024-2025 Chevrolet Silverado 2500 HD ZR2
2020-2025 Chevrolet Silverado 3500 HD High Country
2020-2025 Chevrolet Silverado 3500 HD LT
2020-2025 Chevrolet Silverado 3500 HD LTZ
2020-2025 Chevrolet Silverado 3500 HD WT
2020-2021 GMC Sierra 2500 HD Base
2020-2025 GMC Sierra 2500 HD AT4
2020-2025 GMC Sierra 2500 HD Denali
2020-2025 GMC Sierra 2500 HD SLE
2020-2025 GMC Sierra 2500 HD SLT
2022-2025 GMC Sierra 2500 HD Pro
2024-2025 GMC Sierra 2500 HD AT4X
2020-2021 GMC Sierra 3500 HD Base
2020-2025 GMC Sierra 3500 HD AT4
2020-2025 GMC Sierra 3500 HD Denali
2020-2025 GMC Sierra 3500 HD SLE
2020-2025 GMC Sierra 3500 HD SLT
2022-2025 GMC Sierra 3500 HD Pro

Product Details

Product Description
Part Numbers
Sizing & Fit

About K&N Engineering

K&N has been the world's leader in washable, reusable performance air filters since 1969. From the legendary cone filter to complete cold-air intake systems, K&N's cotton-gauze element delivers more airflow than paper while staying serviceable for the life of the vehicle.

K&N Performance Oil Separator Catch Can (81-0812) for GM Trucks

Safeguard your engine's performance and longevity with the K&N 81-0812 Air Oil Separator Catch Can, specifically designed for 2020-2025 Chevrolet Silverado 2500/3500 HD and GMC Sierra 2500/3500 HD models equipped with the 6.6L engine. This essential component captures oil and moisture from the blow-by gasses in your engine's crankcase, preventing them from entering the intake system and causing potential damage or performance degradation.

Why Choose the K&N 81-0812 Catch Can?

  • Engine Protection: Effectively traps oil particles and moisture, preventing them from contaminating your intake manifold and intercooler.
  • Performance Preservation: By keeping the intake system clean, it helps maintain optimal engine performance and fuel efficiency.
  • Reduced Oil Consumption: Minimizes the amount of oil that gets recirculated back into the combustion chamber.
  • Easy Installation: Features a quick, 30-minute installation process using basic tools and factory-style connectors.
  • High-Capacity Reservoir: The large reservoir makes checking and emptying the collected oil simple and infrequent.
  • Vehicle Specific Design: Engineered to fit seamlessly into the engine bay of your compatible GM truck.
  • Lifetime Warranty: Backed by K&N's No-Hassle Lifetime Limited Warranty for peace of mind.

The K&N Air Oil Separator is a crucial upgrade for any truck owner looking to protect their investment. By installing this catch can, you actively combat the harmful effects of blow-by, ensuring your 6.6L Duramax engine runs cleaner and stronger for years to come. Invest in superior engine protection with GGCRACING.

Vehicle Fitment

Years Make Model Trim
2020-2025 Chevrolet Silverado 2500 HD Custom
2020-2025 Chevrolet Silverado 2500 HD High Country
2020-2025 Chevrolet Silverado 2500 HD LT
2020-2025 Chevrolet Silverado 2500 HD LTZ
2020-2025 Chevrolet Silverado 2500 HD WT
2024-2025 Chevrolet Silverado 2500 HD ZR2
2020-2025 Chevrolet Silverado 3500 HD High Country
2020-2025 Chevrolet Silverado 3500 HD LT
2020-2025 Chevrolet Silverado 3500 HD LTZ
2020-2025 Chevrolet Silverado 3500 HD WT
2020-2021 GMC Sierra 2500 HD Base
2020-2025 GMC Sierra 2500 HD AT4
2020-2025 GMC Sierra 2500 HD Denali
2020-2025 GMC Sierra 2500 HD SLE
2020-2025 GMC Sierra 2500 HD SLT
2022-2025 GMC Sierra 2500 HD Pro
2024-2025 GMC Sierra 2500 HD AT4X
2020-2021 GMC Sierra 3500 HD Base
2020-2025 GMC Sierra 3500 HD AT4
2020-2025 GMC Sierra 3500 HD Denali
2020-2025 GMC Sierra 3500 HD SLE
2020-2025 GMC Sierra 3500 HD SLT
2022-2025 GMC Sierra 3500 HD Pro

Product Details

Product Description

About K&N Engineering

K&N has been the world's leader in washable, reusable performance air filters since 1969. From the legendary cone filter to complete cold-air intake systems, K&N's cotton-gauze element delivers more airflow than paper while staying serviceable for the life of the vehicle.

K&N Performance Oil Separator Catch Can (81-0812) for GM Trucks

Safeguard your engine's performance and longevity with the K&N 81-0812 Air Oil Separator Catch Can, specifically designed for 2020-2025 Chevrolet Silverado 2500/3500 HD and GMC Sierra 2500/3500 HD models equipped with the 6.6L engine. This essential component captures oil and moisture from the blow-by gasses in your engine's crankcase, preventing them from entering the intake system and causing potential damage or performance degradation.

Why Choose the K&N 81-0812 Catch Can?

  • Engine Protection: Effectively traps oil particles and moisture, preventing them from contaminating your intake manifold and intercooler.
  • Performance Preservation: By keeping the intake system clean, it helps maintain optimal engine performance and fuel efficiency.
  • Reduced Oil Consumption: Minimizes the amount of oil that gets recirculated back into the combustion chamber.
  • Easy Installation: Features a quick, 30-minute installation process using basic tools and factory-style connectors.
  • High-Capacity Reservoir: The large reservoir makes checking and emptying the collected oil simple and infrequent.
  • Vehicle Specific Design: Engineered to fit seamlessly into the engine bay of your compatible GM truck.
  • Lifetime Warranty: Backed by K&N's No-Hassle Lifetime Limited Warranty for peace of mind.

The K&N Air Oil Separator is a crucial upgrade for any truck owner looking to protect their investment. By installing this catch can, you actively combat the harmful effects of blow-by, ensuring your 6.6L Duramax engine runs cleaner and stronger for years to come. Invest in superior engine protection with GGCRACING.

Vehicle Fitment

Years Make Model Trim
2020-2025 Chevrolet Silverado 2500 HD Custom
2020-2025 Chevrolet Silverado 2500 HD High Country
2020-2025 Chevrolet Silverado 2500 HD LT
2020-2025 Chevrolet Silverado 2500 HD LTZ
2020-2025 Chevrolet Silverado 2500 HD WT
2024-2025 Chevrolet Silverado 2500 HD ZR2
2020-2025 Chevrolet Silverado 3500 HD High Country
2020-2025 Chevrolet Silverado 3500 HD LT
2020-2025 Chevrolet Silverado 3500 HD LTZ
2020-2025 Chevrolet Silverado 3500 HD WT
2020-2021 GMC Sierra 2500 HD Base
2020-2025 GMC Sierra 2500 HD AT4
2020-2025 GMC Sierra 2500 HD Denali
2020-2025 GMC Sierra 2500 HD SLE
2020-2025 GMC Sierra 2500 HD SLT
2022-2025 GMC Sierra 2500 HD Pro
2024-2025 GMC Sierra 2500 HD AT4X
2020-2021 GMC Sierra 3500 HD Base
2020-2025 GMC Sierra 3500 HD AT4
2020-2025 GMC Sierra 3500 HD Denali
2020-2025 GMC Sierra 3500 HD SLE
2020-2025 GMC Sierra 3500 HD SLT
2022-2025 GMC Sierra 3500 HD Pro

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