Fits Factory Heads, no machining required.

Valve Spring Kit for SB FORD GT40 w/ Stock Cam

Application: SB Ford GT40

Fitment: GT40 and other 302 heads w/ .393"/.481" tip length valves

This version is for SBF engines running the stock hydraulic roller cam, works with the HO cam as well as other factory hyd roller cams w/ up to .450" lift using 1.6 rockers.

Clears both, stock type rockers as well as aftermarket roller rockers.

This kit will increase seat pressure by 30+% and the open pressure by 43+%

• Stock seat pressure- 70-75 Lbs (valve closed)
• These springs- 100 Lbs (30+% more seat pressure)
• Stock open pressure- 210-220 Lbs
• These springs open pressure- 315 Lbs (43+% more open pressure)

This is a heavy duty kit for low lift cams specially designed to support increased RPM and idle quality when running OEM factory/stock hyd roller cams.

The default version works with stock .393"/.481" tip length valves. If the exhaust valves have been changed to aftermarket valves w/ .393", select the .393"/.393" option towards the top of the page.

      Spring Specifications:

• Spring Type- Heavy Duty HP Single w/ Damper
• Machine work required?- NO
• 1.510" Outside Diameter
  
• .960" Inside Diameter
  
• 100 Lbs @ 1.790" Valve Closed Installed Height (installed height measurements required)
  
• 315 Lbs @ .450" Lift

     Kit includes:

• Package of eight intake retainers & locks.
  
• Package of eight exhaust retainers & locks
  
• 16 Drop in Heavy Duty HP Valve Springs
• Specification Sheet
• Installed height diagram 
  

To add a set of our Premium Viton Valve Seals or a Hardened Shim pack, use the appropriate check box up towards the top of this page.

Thank you~

 Alex's Parts- The smart choice in valve train parts~