We recommend switching to the 2004 GM spec of 5w30 oil at the time of installation. We also recommend synthetic motor oil once your engine is broken in. These things should increase the life of your engine especially when increasing it's HP output. Kit includes:

• New oil pressure relief valve
• Oil pressure relief spring
• Oil filter bracket gasket

Oil filter adapter to timing cover: 22 ft/lbs 97 earlier
132 in/lbs + 50 degrees 97 and later Oil pump.