Drag Race 1300 Series Valve Spring 1.536 Dual - 1.065 lift
Pro-Stock - Top Fuel Dragster - Top Fuel Funny Car - Top Alcohol Funny Car - ProMod
1300 Series Processing Improves Fatigue Life, which enhances the longevity against premature spring failures. 1300 Series processing involves REM polishing, and Nano Peen, a micro shot peening done to the surface.
All 1300 series springs come with an ID chamfer to improve clearance on the radius of the spring Retainer.
- 1.536 OD
- ID Outer- 1.050"
- ID Inner-0.726"
- Installed 2.350" @ 377#
- Open 1.300" @ 1389#
- Max Lift 1.065
- Coil Bind- 1.215
- 964 #/in Rate