All Street Valve Springs will be shipped w/c 16th June 2025

Sold in packs of 24.

Upgraded valve springs are for those who want to replace their valve springs during a rebuild or are looking for greater valve control at higher rpm and boost levels. 

These valve springs have been specifically designed to work with your original valve train so the standard spring seat washer and the standard spring cap retainer should be used with these springs. No need for custom valve train hardware to make these work they are a direct drop in replacement. 

Street Performance Valve Springs

These springs have 30% more seat pressure than the stock versions and are ideal for anyone pushing more boost and higher RPM. These springs cover 9 out of 10 applications, we use them on our engine rebuilds even at lower power levels. They give a nice increase in valve spring without pushing towards the damaging higher spring rates. This is an ideal replacement for the 648 valve spring upgrade but also allows for a little extra cam lift should you ever decide to go that route. 

Race Performance Valve Springs

These springs are 75% over stock seat pressure. They will allow for a higher lift cam (but also work perfectly with the stock cam) whilst maintaining valve control at higher rpm. These springs are advised for race applications only (for vehicles that have had their cam shaft exhaust gear locked via welding or pin method).