Radium FPR Spring- Wide Range (Use with Radium MPR, DMR, and FST-R) Category_Fuel Management For up to 9000rpm and

For up to 9000rpm and 40psi boost Kelford Cams recommend valve spring KVS63-BTK-X

Nissan R Chassis - Skyline GT / GTS-T/ GTS-4 / GTT / GTR

The custom bracket mounts to the front RH side of the cylinder head for compatiblity with most LS engines

This well-engineered piece of gear is specifically designed to maximize fluid flow out of the back of the Nissan RB Twin Cam cylinder head where it needs it most

Opening Pressure: 0-1 kPA

Radium FPR Spring- Wide Range (Use with Radium MPR, DMR, and FST-R) Category_Fuel Management For up to 9000rpm andReplacement internal spring for the following Radium products: MPR Regulator, P N 20 0100 00, 20 0100 01 DMR Regulator, All Versions FPD R Pulse Damper, P N 20 0176, 20 0178