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

The Turbosmart Dual Port Range is proof you can have the best of both worlds

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

our Billet Block Insert is engineered to meet the unique demands of these high-performance vehicles

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