*Accurate average torque readings were attained after 4,000 rpm, allowing for converter lock-up (less slippage).
Note: a gain of 134 rwhp at 6,100 rpm (not peak) was realized from the previous ported-head swap, and now the roller cam.
Indy Sr Heads Flow ChartAs tested at Ray Barton Racing Engines, SuperFlow SF-600 flowbench.
Note: To obtain similar flow and power numbers, Indy sells the SR295 CNC heads. The CNC heads will save you from many hours of porting.