Power Driven Stage 3 CNC-Ported Race Cylinder Head 12v

Power Driven's 12v Cummins Stage 3 CNC-Ported Race Cylinder Head features a new aftermarket casting that is surfaced to OEM specifications in-house using state-of-the-art equipment to ensure reliable head gasket sealing, then is machined for fire-rings to provide the ultimate seal possible with a fire-ring head gasket. These heads receive Power Driven's Race Port as well as enlarged pushrod holes for better clearance and improved oil drain-back, and threaded freeze plugs for reliable operation at high rpm. After porting, valve seat work is performed to fit larger aftermarket 1.87" intake and 1.75" exhaust valves. In addition, every CNC-ported Power Driven cylinder head is machined for compatibility with our Doweled Batwing Rocker Pedestals. Our expert technicians then assembled this head with OEM top-hat-style seals and Power DrivenRace Conical Valve Springs.

The Power Driven Diesel Race Port is the most extreme CNC port job that can be achieved with the factory intake shelf intact. It outflows many of the competitor's bolt-on shelf/runner intake heads, while retaining the reliable factory shelf and water cooling. On our SuperFlow 1020 test bench, this port produced a 68% increase on the intake and a 65% increase on the exhaust. This port flows an incredible 234 CFM on the intake and 232 CFM on the exhaust at 28".

In real-world back-to-back dyno testing on a 1,500 hp race truck, the higher flow from this race port showed a 119 hp gain versus the baseline stock head. This head is designed for use with an aftermarket high-lift camshaft and is not intended for street use. While it is possible to run this head on the street, the thin port walls and heavy valve spring pressure are not ideal for longevity in a street application. If you're looking for the ultimate water-cooled head for a dedicated 12v Cummins race engine, this is it!

Features:

• Fire-ringed deck surface
• Race port
• Pushrod clearance
• Threaded freeze plugs
• Top-hat valve stem seals
• Oversized 1.87" intake valves
• Oversized 1.75" exhaust valves
• Race conical valve springs and retainer