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Jack Hammer Big Block Chevy Cylinder Heads by Jason Line


Jason Line of NHRA Pro Stock lineage has now released the Jack Hammer Big Block Chevy 4.84 / 24* Cylinder Head. 

This head features a propriety port and chamber configuration based off the successful head design from DRCE's Championship winning 500" NHRA Pro Stock Engine.

Dyno Testing on 582" engine against Brodix 385CC. Jack Hammer Made 15 more HP and Tq through smaller intake port and valve. 

Comes with 5 Angle valve job for 2.300/1.900 Valves. Add your valve train and go.