Soup Nazi
The artist formerly known as Don M
- Joined
- Sep 26, 2006
- Messages
- 1,197
The best deal of the year yet on the original and best "drop-in" spring for the 24 Valve Cummins engine.
Back in the late winter we did a re-design of the Pro/Sport to allow for longer life and slightly more pressure. Nothing radical.
We have never had a broken retainer, broken valve or any component while using the F1 Pro/Sports. We have the lowest horsepower drag, lowest oil temperature and lowest wear rates. Our springs do not deflect or bend the stock push rods.
Yes, they control the valves! Many are running these with over 120 PSI of boost!
Back in the late winter we did a re-design of the Pro/Sport to allow for longer life and slightly more pressure. Nothing radical.
We have never had a broken retainer, broken valve or any component while using the F1 Pro/Sports. We have the lowest horsepower drag, lowest oil temperature and lowest wear rates. Our springs do not deflect or bend the stock push rods.
Yes, they control the valves! Many are running these with over 120 PSI of boost!