Fits Factory Heads, no machining required.

Performance Valve Spring Kit for SB FORD GT40

Application: Hydraulic Flat Tappet cam applications

Fitment: GT40 302 heads (for GT40P kits, check our other listings)

Processing Time: Current processing time is around 30 days. This means your order will ship around 30 days after being placed.

This version is for SB Ford GT40 w/ Hyd Flat Tappet cam/lifters

For use with hyd flat tappet cams w/ up to around 228 degrees @ .050"

Comes with parts to fit the staggered tip length valves used in SB Ford GT40 heads.

Works with 1.6 or 1.7 ratio rocker arms up to .560" lift.

      Average Spring Specifications:

• Spring Type- HP Single w/ Damper
• Machine work required?- NO
• 1.460" Outside Diameter
  
• I.D.- Fits over stock .990"-.993" Register / Step
  
• 115 Lbs @ 1.810" Valve Closed Installed Height (see *note towards bottom on page)
  
• 271 Lbs @ .500" Lift
• 293 Lbs @ .560" Lift

     Kit includes:

• Eight Intake Retainers, labeled for easy identification
  
• Eight Exhaust Retainer, labeled for easy identification
• 32 Hardened Valve Locks
• 16 Drop in springs
• Spec Sheet
• Installed height Specifications

    Fitment:

• For use with factory .393"/.481" staggered tip length valves used in OEM SB Ford GT40 iron heads.
• Heads which have been fitted with aftermarket .393" tip length exhaust valves need to select the .393"/.393" option.

Buyers can add: Shims and/or Seals by checking the appropriate boxes towards the top of the page. These items are added in at slightly discounted prices with reduced shipping rates.

*Note: Kit installed height may differ from advertised spec listed above. Each kit comes with it's own installed height specification card. Please use the installed height specifications included with your kit.

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