Drag Race 1300 Series Valve Spring 1.550 Dual - 1.050 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.
- 1.550 OD
- ID Outer- 1.050"
- ID Inner-0.726"
- Installed 2.300" @ 425#
- Open 1.300" @ 1440#
- Max Lift 1.050
- Coil Bind- 1.230
- 1015 #/in Rate