4 Piston Racing PSI Pro Stock Valve Spring and Titanium Retainer Kit Honda (H Series) 300M Material

300M Material

Additional items checked are runout

H1005D - Seat Pressure 93 lb

There is NO support for these with the OEM ECU

Max recommended lift on this spring is

4 Piston Racing PSI Pro Stock Valve Spring and Titanium Retainer Kit Honda (H Series) 300M MaterialWe are proud to offer the highest quality, longest lasting valve springs for your K Series and S2000 engine Period. Valve control is one of the most important parts of making power and promoting long engine life. Too often springs are pushed beyond their functional limits and valves bounce out of control. We put these kits together after extensive testing and these are a must if you are racing competitively, turning high rpm, and running large