PAC Racing Springs offer superior performance, durability and value for turbo Buick V6 applications.

These valve springs are the most common spring used in turbo Buicks running a mild roller cam, including all of our billet roller cams.

Specifications:

OD Outer: 1.244
ID Outer: 0.860
Damper: Yes
ID Inner: 0.770
Installed Height (Valve Closed): 125 @ 1.750
Open Load (Valve Open): 350 @ 1.250
Spring Rate: 450
Max Coil Bind: 1.100
Max Lift: 0.550

Part Number: PAC 1200-12