1967 To 1979 Pontiac V8 Stock Valve Spring Kit 400 455 389 350 428 GTO Firebird

1967 Through 1979 Pontiac STOCK REPLACEMENT Valve Spring Kit

SBI Part Numbers 16 Of Each

160-1136 Inner + 160-1137 Outer

Fits Pontiac 326 350 400 455 428 From 1967 Through 1979

Except Ram Air ,  Except 1967-1970 With Factory Manual Transmission

SPECIFICATIONS

160-1136 Inner Spring
1.060" OutsideDiameter
0.776" Inside Diameter
1.760" Length
0.950" Solid Length
0.142" Wire Diameter
A877 Material
102 Lbs @ 1.114" Open Pressure
31 Lbs @ 1.566" Closed Pressure
6.75 LH Turns / Direction

160-1137 Outer Spring
1.398" Outside Diameter
1.058" Inside Diameter
1.940" Length
0.990" Solid Length
0.170" Wire Diameter
AS33 Material
140 Lbs @ 1.134" Open Pressure
62 Lbs @ 1.586" Closed Pressure
5.80 LH Turns / Direction

These Are A Stock Replacement DROP IN Spring No Machining Required