Running bigger camshafts? These springs are a must. Our 82# valve springs are built to handle the increased lift and duration of aggressive cam profiles, keeping valve control tight at high RPM and preventing valve float — so your engine keeps making power exactly where you need it.
 
Why you need this kit:
Higher spring pressure keeps valves seated properly under increased cam lift
Prevents valve float and bounce at higher RPM
Essential support component for our Endurance and Stage 2 Race camshafts
Built for reliability under sustained high-performance use
 
Proven Performance
We've tested these springs to 8,000 RPM on stock retainers with zero valve float and zero failures — giving you confidence this kit can handle serious RPM without needing to upgrade retainers.
 
Drop-In Fitment
Most Kits require you to source new retainers or valve seals — these springs are a direct drop-in fit with your OEM retainers and valve seals, keeping install straightforward and your parts list short.
 
Easy Install
Designed to drop in without extra machining or modification, making this an easy add-on for anyone already in the valvetrain for a cam swap.
 
Compatibility:
Designed specifically for the Ecotec platform.
 
Recommended pairing:
Required when running our Endurance or Stage 2 Race Camshafts, along with a mechanical timing tensioner and extended (or solid) lifter kit. Running upgraded cams without proper spring support can lead to valve float and engine damage.
 
FAQ
Do I need new retainers or seals to run these springs?
No — these are a drop-in fit with your OEM retainers and valve seals. No extra parts or machining required.
 
What cams require this spring kit?
Our Endurance and Stage 2 Race Camshafts both require upgraded valve springs to maintain proper valve control at increased lift and duration.
 
What RPM can these handle?
We've tested these springs to 8,000 RPM on stock retainers with zero valve float or failure.
 
What's the seat pressure on these springs?
82 lb at installed height.