K&N 20-23 GM 2500/3500 6.6L Oil Separator Catch Can K&N Engineering KNN81-0812
K&N 20-23 GM 2500/3500 6.6L Oil Separator Catch Can K&N Engineering KNN81-0812
K&N 20-23 GM 2500/3500 6.6L Oil Separator Catch Can K&N Engineering KNN81-0812
K&N 20-23 GM 2500/3500 6.6L Oil Separator Catch Can K&N Engineering KNN81-0812
K&N 20-23 GM 2500/3500 6.6L Oil Separator Catch Can K&N Engineering KNN81-0812
K&N 20-23 GM 2500/3500 6.6L Oil Separator Catch Can K&N Engineering KNN81-0812
K&N 20-23 GM 2500/3500 6.6L Oil Separator Catch Can K&N Engineering KNN81-0812
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K&N 20-23 GM 2500/3500 6.6L Oil Separator Catch Can

KNN81-0812
024844401366
Oil Separators
20+ Units In Stock - Ships Next Business Day
$ 157.99
$ 157.99

SKU: 81-0812 | UPC: 024844401366

K&N 2020-2025 Chevrolet Silverado GMC Sierra 2500/3500 HD 6.6L Oil Separator Catch Can 81-0812

The K&N 81-0812 Air Oil Separator captures blow-by oil in a 6oz high-capacity reservoir to shield your 6.6L engine and intake tract from contamination. Designed for 2020-2025 Chevy Silverado 2500 HD 3500 HD and GMC Sierra 2500 HD 3500 HD models it prevents power loss and detonation while reducing oil buildup. Quick 30-minute installation uses factory-style hose connections for direct fit replacement of the crankcase line.

Key Features

  • 30-Minute Installation: Bolts on in 30 minutes with basic tools snaps onto factory hoses mounts anywhere in engine bay.
  • Blow-By Protection: Captures oil mist from PCV system prevents contamination in intake tract and valves.
  • 6oz Reservoir: Large capacity holds more oil no tools needed to check or empty translucent design shows fill level.
  • Vehicle-Specific Fit: Direct replacement for crankcase vent line engineered for 6.6L L8T V8 gas engines.
  • Lifetime Warranty: Backed by K&N No-Hassle Lifetime Limited Warranty premium OEM-style connectors and hoses.

Product Notes

  • Empty reservoir regularly based on driving conditions to maintain performance.
  • Mount vertically for best drainage use provided bracket for secure fit.
  • Product weight 2.3 lbs shipping box 9.25 x 6.25 x 6.25 inches.

Installation Notes

  • Professional installation recommended.
  • Disconnect battery unplug PCV hose from valve cover route through separator basic hand tools only.
  • Compatible with stock hardware no drilling or modifications required.

This Part Fits

Year Make Model Submodel
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
2020-2025 GMC Sierra 2500 HD AT4
2024-2025 GMC Sierra 2500 HD AT4X
2020-2021 GMC Sierra 2500 HD Base
2020-2025 GMC Sierra 2500 HD Denali
2022-2025 GMC Sierra 2500 HD Pro
2020-2025 GMC Sierra 2500 HD SLE
2020-2025 GMC Sierra 2500 HD SLT
2020-2025 GMC Sierra 3500 HD AT4
2020-2021 GMC Sierra 3500 HD Base
2020-2025 GMC Sierra 3500 HD Denali
2022-2025 GMC Sierra 3500 HD Pro
2020-2025 GMC Sierra 3500 HD SLE
2020-2025 GMC Sierra 3500 HD SLT

Why Choose K&N?

  • Over 60 years engineering filtration and engine protection products.
  • High-capacity design handles heavy blow-by from performance engines.
  • Precisely engineered for exact PCV routing on 6.6L GM trucks.

Frequently Asked Questions

  • Q: Does it fit 2025 Silverado 2500 HD 6.6L gas?
    A: Yes fits all listed 2020-2025 Chevy Silverado GMC Sierra 2500/3500 HD models with 6.6L L8T V8 gas engine.
  • Q: What material is the reservoir?
    A: Durable translucent polymer reservoir with aluminum fittings for visibility and strength.
  • Q: How is warranty handled?
    A: No-Hassle Lifetime Limited Warranty covers defects in materials workmanship contact K&N for claims.

Shipping & Handling

  • Method: UPS Ground or FedEx
  • Availability: In stock - ships same or next business day
  • Packaging: Secure box 9.25 x 6.25 x 6.25 inches
  • Weight: 2.3 lbs

Request For Information

Have questions about K&N 20-23 GM 2500/3500 6.6L Oil Separator Catch Can? Fill out the form below and we'll get back to you by the next business day.
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