Powerstroke Products 6.0 20mm Head LOADED HD Valve springs 20 Inch Gauge threaded for -4AN

Gauge threaded for -4AN

Matched ports and a merged runner design reduces exhaust backpressure

Each bolt is centerless ground to ensure the bearing surface is perpendicular to the threads creating equal load distribution

Kit comes with downpipe

Powerstroke Products 6.0 20mm Head LOADED HD Valve springs 20 Inch Gauge threaded for -4ANPowerstroke Products 6. 0 Head, Sold Each. These heads with the heavy duty 100# valve springs are an excellent choice for upgraded Turbo and mild tuning. More control over valve train means more useable power. No Core all new parts. Heads come with new valves, Iron valve guides , valve seats, valve stem seals and of course the Springs. Ready to install with injector cups already pressed in. These heads carry a one year unlimited mileage warranty from