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SB Ford GT40P Drop In Valve Springs Kit, Hyd Roller .580" Lift

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Calculated at checkout

Product Description

Fits Factory Heads, no machining required.

High Performance Valve Spring Kit for SB FORD GT40P

Application: Hydraulic Roller, up to .580" Lift

Fitment: GT40P, E7 and other 302 heads w/ .393"/.481" tip length valves


Our High Performance valve spring kits are specially engineered to suit SBF heads with staggered tip length valves, including GT40P and E7 heads.

We carry them in several different configurations: .480", .540", .580" and .600" lifts. Each kit offers it's own advantage to work with a wide range of different camshaft profiles.

This listing is for the .580" version, VSK7k49

Unlike some of the earlier SB Fords where the valve tip lengths were the same for both intake and exhaust, GT40P heads use two different lengths.

Since the goal is to use the same high performance springs on all sixteen valves, a special retainer and lock combination is are required.

Our drop in valve spring kit is engineered to fit these heads with outstanding results.

The kit comes with locks which are marked for Intake and Exhaust.

Our performance springs fit GT40P heads without additional modifications, no machine work required. Just set up the installed heights and assemble.

Designed for mild to moderate high lift Hydraulic Roller cams, this kit will handle many Hyd Roller cams up to around 230 degrees duration @ .050". (For longer duration cams, use VSK7m49-M) For short to mid lift cams, (.450"-.540" lifts)  use VSK7G49-M

If you need help determining if these will work with your cam, just send us an e-mail with the cam specs or better yet, the cam brand & part number and a link to the specification page. We'd be happy to verify compatibility.

Works great with many of today's popular Motorsport, Trick flow, Comp & Lunati performance cams.

Suitable for 1.6 and 1.7 ratio rocker arms as long as the lift does not exceed .580"


      Average Spring Specifications:

  • Spring Type- HP Single w/ Damper
  • Machine work required?- NO
  • 1.460" Outside Diameter
  • I.D.- Fits over stock .990"-.997" Register / Step
  • 123 Lbs @ 1.775" Valve Closed Installed Height
  • 284 Lbs @ .500" Lift
  • 312 Lbs @ .580" Lift



     Kit includes:

  • Package of eight intake retainers & locks.
  • Package of eight exhaust retainers & locks
  • 16 Drop in High Performance valve springs
  • Specification Sheet
  • Installed height diagram




  • Staggered tip length SB Ford GT40p heads


Applications with larger, higher lift cams should consider VSK7m49-M w/ 130 Lbs seat and 375 Lbs open

Requirements- For best performance, measure valve spring height during installation and add shims as required to establish the target installed height. (specification included with every spring kit)


Buyers can add: Shims and/or Seals by checking the boxes to the right of the pictures. 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.


Note: This item is currently not available for Flat Tappet cams. Order for hyd roller only




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

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