Sinister Diesel Master Cylinder Cap 17-26 Chevy Duramax L5P DOR-615-201 it could be a faulty

it could be a faulty oil cooler

it helps enhance throttle response

High quality DU bearing provides the bearing surface for the massive 1" nitrotec steel shaft

because it must be programmed into the AutoCal

Sinister Diesel Master Cylinder Cap 17-26 Chevy Duramax L5P DOR-615-201 it could be a faultyUpgrade your Chevy Duramax L5P with the Sinister Diesel Master Cylinder Cap, a simple, direct fit replacement designed to improve sealing and durability over the factory cap. Made from quality materials with a corrosion resistant finish, this cap helps protect your brake fluid reservoir from contamination while adding a clean, finished look under the hood. Easy to install with no modifications required, this master cylinder cap is a quick and