FTF Performance Valve Springs:
Beehive Kits for 5/16 valves
High silicon & vanadium alloy spring wire – Extra processing for fatigue resistance – Resist pressure loss & failure associated with extremely aggressive cams in high compression engines – Reduce vibration & harmonics. Made in the USA.
Max lift
|
Seat pressure
|
Coil bind
|
|
| .600″ | 165 @ 1.860″/384 @ 1.250″ | 1.200″ | $129.95 |
| .650″ | 185 @ 1.860″/370 @ 1.250″ | 1.150″ | $129.95 |
Standard double spring kits for 5/16 valves
High silicon & vanadium alloy spring wire – Extra processing for fatigue resistance – 1.375″ top retainers for better clearance inside rocker boxes – Springs feature chamfered top to match smaller retainers. Made in the USA.
| Max lift | Seat pressure |
Coil bind | |
| .600″ | 155 @ 1.875″/405 @ 1.260″ | 1.080″ | $129.95 |
| .650″ | 185 @ 1.860″/460 @ 1.160″ | 1.080″ | $129.95 |
| .675″ Extreme Duty | 185 @ 1.860″/460 @ 1.160″ Titanium | 1.080″ | $229.95 |
