High quality billet aluminum oil filler cap with swivel oil return port. Perfect OEM match. Fits Duramax 6.6L and many other modern Chevy/GMC Duramax engines. Port size is 1/8" NPT. Includes o-ring.
Modern Chevy/GMC Duramax
New F150 V6 Powerstroke 3.0L (fits perfectly on this model)
The oil filler cap replaces the stock filler cap and returns oil from a bypass oil filter back into your oil supply.