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Fits Factory Heads, no machining required.
High Performance, High Lift 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 which incudes GT40P and E7 heads.
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.
They normally have .393" tip length intakes and .481" tip length exhausts.
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 performance Hydraulic Roller cams, our kit will handle most cams up to around 232 degrees duration @ .050".
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"
Our GT40P spring kit is the finest drop in Gt40 spring kit available.
Excellent valve control w/ High Performance cams up to 234 degrees duration @ .050".
Applications with larger cams should one of consider our Max Output or our limited edition spring kit.
For specifications on Max Output spring kits, check our other spring kit listings.
Requirements- Measure valve spring height during installation. For more information on setting up valve spring installed height, read the information we has available under the "Valve Spring Shims" category.
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. Although we also offer std shims, we recommend using hardened shims with this kit. Please note our viton valve seals are premium OE style replacement seals which are far superior to gasket set seals.
*Note: Customers running mild cams up to .480" lift including the stock cam with 1.6 or 1.7 ratio rockers can check our "A" kits. Enter VSK7A49 for GT40P and VSK7A48 for GT40 into search to view details.
*Note2: Actual installed height may differ than 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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