Valve Springs for 308778 & TR5 Cams. 12 102564 Inner & 12 149633 Outer RM. Use 0.150" Thick Collars 149717 under Inner Spring. Closed Coils Fit Downward.
Fitted Pressures: Inlet 30 Lbs at 36mm. Exhaust 38 Lbs at 35mm
Also proven to work with TH5 profile, .282” cam lift
