The most simple & reliable CCV system for your Cummins Marine Diesel

The EnviroVent CCV kit is a simple and cost effective CCV system for your Cummins B, C, & L series marine diesel. The Envirovent was designed to be the perfect and simple upgrade replacement for the very troublesome factory supplied Walker System that can cause so much unnecessary grief on any B series Cummins.

6BTA 5.9 Marine EnviroVent CCV Kit
EnviroVent CCV Kit 4BT & 6BT Series Below 250HP (3″ Air Cleaner)
not rated $394.00 Select options This product has multiple variants. The options may be chosen on the product page
6BTA 5.9 Marine EnviroVent CCV Kit
EnviroVent CCV Kit for 6BTA 5.9 Series Engines 250HP and up (4″ Air Cleaner)
not rated $446.00 – $1,024.00 Select options This product has multiple variants. The options may be chosen on the product page
6BTA 5.9 Marine EnviroVent CCV Kit
EnviroVent CCV Kit 6BTA Series for V-Drive Setups or other Unique Applications
EnviroVent CCV Kit 6BTA Series for V-Drive Setups or other Unique Applications
not rated $446.00

In stock

Engine Blow-By Condition

For engines that are experiencing heavy blow-by AND you have enough vertical clearance above the #6 valve cover, then you can add an extension that will greatly mitigate the engine blow-by. Typical length of the valve cover extension is between 4″ – 8″.

Extension Kit Information

If you have chosen to add an extension kit to your EnviroVent product to better mitigate your engine’s blow-by condition, please enter the length in inches that you have available above the #6 valve cover.

6CTA 8.3 & QSL Marine EnviroVent CCV Kit
EnviroVent CCV Kit 6CTA 8.3 & QSL 9 & QSC
not rated $394.00 – $415.00 Select options This product has multiple variants. The options may be chosen on the product page
QSB 5.9 Marine EnviroVent CCV Kit
EnviroVent CCV Kit QSB 5.9 Series
not rated $394.00

In stock

EnviroVent CCV Kit for Yanmar 4LHA
EnviroVent CCV Kit for Yanmar 4LHA
not rated $415.00

In stock

Cummins Marine Mechanical Engine Oil Fill Cap (SMX EnviroVent)
Cummins Marine Mechanical Engine Oil Fill Cap (SMX EnviroVent)
not rated $26.00

In stock

EnviroVent CCV Replacement Breather Filter
EnviroVent CCV Replacement Breather Filter
not rated $32.00 – $53.00 Select options This product has multiple variants. The options may be chosen on the product page