K&N Engineering

K&N 20-23 GM 2500/3500 6.6L Oil Separator Catch Can - 81-0812

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SKU:
KNN81-0812
UPC:
024844401366
MPN:
81-0812
Availability:
Regularly stocked product
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$157.99

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Description

What is blowby?
Blowby is unburned fuel and combustion byproducts that leak past piston rings into the crankcase, contaminating your oil.

How long does it take to install?
Install the K&N Catch Can quickly in approximately 30 minutes using basic tools and its plug-and-play design.

K&N Catch Cans for the 2020-2025 Silverado and Sierra 2500/3500 HD trucks deliver maximum engine protection, preventing power loss. Its industry-leading high capacity reservoir captures harmful blowby oil efficiently. Trust K&N for a confident, direct-fit oil separation solution that safeguards your engine's performance.

Key Features

  • captures the oil in our industry leading high capacity reservoir
  • helps prevent power loss and possible engine damage caused by blowby
  • quick and easy to install in about 30 minutes with basic tools
  • uses factory-style hose connections to quickly snap on and off
  • replaces the factory line from the crank case
  • No tools are needed to check and empty the oil collector reservoir

Why Choose the KN Catch Cans

Delivers maximum engine protection by trapping harmful oil blowby.

Achieves sustained peak performance by preventing power-robbing oil contamination.

Provides hassle-free maintenance with a simple, tool-free emptying process.

Transforms your engine bay with a quick, 30-minute bolt-on installation.

Who Is This For?

Easy DIY Install — 9/10
Plug-and-play, basic tools, 30 minutes.

Engine Performance — 8/10
Prevents power loss from blowby.

Heavy Towing — 7/10
Helps prevent engine damage from blowby.

Street Performance — 7/10
Prevents power loss from blowby.

Overlanding / Expedition — 7/10
Helps prevent engine damage from blowby.

Track / Autocross — 7/10
Prevents power loss from blowby.

Vehicle Compatibility

YearMakeModelSubmodel
2020–2025ChevroletSilverado 2500 HDHigh Country
2020–2025ChevroletSilverado 2500 HDCustom
2020–2025ChevroletSilverado 2500 HDLT
2020–2025ChevroletSilverado 2500 HDLTZ
2020–2025ChevroletSilverado 2500 HDWT
2024–2025ChevroletSilverado 2500 HDZR2
2020–2025ChevroletSilverado 3500 HDHigh Country
2020–2025ChevroletSilverado 3500 HDLT
2020–2025ChevroletSilverado 3500 HDLTZ
2020–2025ChevroletSilverado 3500 HDWT
2020–2025GMCSierra 2500 HDSLE
2020–2025GMCSierra 2500 HDAT4
2020–2021GMCSierra 2500 HDBase
2020–2025GMCSierra 2500 HDDenali
2020–2025GMCSierra 2500 HDSLT
2022–2025GMCSierra 2500 HDPro
2024–2025GMCSierra 2500 HDAT4X
2020–2025GMCSierra 3500 HDAT4
2020–2021GMCSierra 3500 HDBase
2020–2025GMCSierra 3500 HDDenali
2020–2025GMCSierra 3500 HDSLE
2020–2025GMCSierra 3500 HDSLT
2022–2025GMCSierra 3500 HDPro

Additional Resources

Official K&N Engineering Product Page

Installation Guide (PDF)

Important Notices

⚠️ CARB Notice: This product is NOT legal for street use in California under CARB (California Air Resources Board) regulations. For off-road or race use only.

⚠️ Proposition 65 Warning: This product can expose you to chemicals including lead and/or other substances known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.

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Warranty Information

This Part Fits:

YearMakeModelSubmodel
2020-2025ChevroletSilverado 2500 HDCustom
2020-2025ChevroletSilverado 2500 HDHigh Country
2020-2025ChevroletSilverado 2500 HDLT
2020-2025ChevroletSilverado 2500 HDLTZ
2020-2025ChevroletSilverado 2500 HDWT
2024-2025ChevroletSilverado 2500 HDZR2
2020-2025ChevroletSilverado 3500 HDHigh Country
2020-2025ChevroletSilverado 3500 HDLT
2020-2025ChevroletSilverado 3500 HDLTZ
2020-2025ChevroletSilverado 3500 HDWT
2020-2025GMCSierra 2500 HDAT4
2024-2025GMCSierra 2500 HDAT4X
2020-2021GMCSierra 2500 HDBase
2020-2025GMCSierra 2500 HDDenali
2022-2025GMCSierra 2500 HDPro
2020-2025GMCSierra 2500 HDSLE
2020-2025GMCSierra 2500 HDSLT
2020-2025GMCSierra 3500 HDAT4
2020-2021GMCSierra 3500 HDBase
2020-2025GMCSierra 3500 HDDenali
2022-2025GMCSierra 3500 HDPro
2020-2025GMCSierra 3500 HDSLE
2020-2025GMCSierra 3500 HDSLT
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Additional Information

CARB:
This product is not CARB Legal and not for sale in California
Case Lot Quantity:
1
Category:
Engine Components>Oil Separators
Clearance Item:
N
MPN:
81-0812
Proposition 65:
Y
Install Type:
Plug and Play
Product Level:
Mid Range
Easy DIY Install:
9/10
Engine Performance:
8/10
Heavy Towing:
7/10
Street Performance:
7/10
Overlanding / Expedition:
7/10
Track / Autocross:
7/10
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