11-16 Duramax Fleece Rear Engine Cover Coolant Return Plug RPI Lower thin steel valve cover

Lower thin steel valve cover gaskets- reusable

With your MBRP performance exhaust you can make that happen with an increase of up to +18HP & 28 ft-lbs

and have an increased inner diameter

All Smarty Jr

Adds 15+Horsepower

11-16 Duramax Fleece Rear Engine Cover Coolant Return Plug RPI Lower thin steel valve coverThe Fleece FPE LML CP Rear Engine Cover Coolant Return Plug for your 2011 2016 GM 6. 6L Duramax LML adds a finishing touch to the underhood of your truck, whether you're putting on an aftermarket turbo or deleting the EGR system. Built from durable high quality 6061 aluminum, this plug features an anodized black finish, and is laser etched with the Fleece Performace "F". Also included is a high temperature silicone o ring to ensure you won't have any