I just put the B303 in my car with my setup and just replaced my old stock springs with new replacement stock valve springs. Its just goin to limit your powerband on your car. This setup gives me gain to about 6200RPM and performance springs will allow gain to about 6500RPM. The stock springs are around 30 for replacement and performance springs are about 90 for replacement and with as much horsepower as I am pushing that little gain wasnt enough to even worry me.
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347 Stroker Motor: Balanced, 30lb Bosch Injectors, Cobra Computer, Cobra Transmission, GT40 Ported and Polished Upper and Lower, GT40 Milled Ported and Polished Heads, B303 Cam, BBK 1 5/8 Headers, March Underdrive Pulleys, Electric Fan, Accel Performance Coil, Accel 300+ Racing Wires, NGK Plugs, Ram Air, K&N Filter, 77mm Mass Air Unit, FlowMaster Exhaust w/offroad H-Pipe, Hurst Short Throw Shifter, 3:55 Gears, Ram Clutch, Cross Drilled Rotors, High Tolerant Painted Calipers and Drums.
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