Fits Factory Heads, machining not required.

Max Output II Valve Spring Kit for SB FORD GT40 running up to .525" lift with Boost.

Application: Hydraulic Roller, up to .525" Lift, 145 Lbs Seat Pressure

Fitment: GT40 302 heads (for GT40P or E7 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.

New to the Max Output family is a valve spring kit tailored for mid lift hyd roller cams and boost.

A drop in style kit for up to 8, maybe 10 Lbs of boost all in a drop in fit, no machine work required configuration.

That's right, no machining required to install.

      Specifications:

• 1.487" Outside Diameter
  
• Fits over factory stepped spring base w/o machine work
  
• Seat- 145 Lbs @ 1.725" Valve Closed Installed Height (tested w/ retainer on) [see Note: 1 below]
  
• Open Load @ .512" Lift: 357 Lbs.
  
• Rate- 410#
• Max lift- .525"
  

     Kit includes:

• Sixteen 10 Degree Retainers
  
• Hardened machined 10 Degree Valve Locks
• 16 Drop in Pacaloy springs
• Spring Spec Sheet
• Installed height Specifications

     Fitment:

• Staggered tip length SB Ford GT40P heads
  
• Heads w/ aftermarket .393"/.393" valves including Ford racing .383"/.383" tip length valves should click the .393"/.393" option check box.

Requirements: Measure spring installed heights- This kit always requires shims to obtain the target installed height. Measure the installed heights and shim to target height. Tolerance specs included with kit.

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

Please note our viton valve seals use the OEM design but are manufactured from premium high temp Viton material. They're easy to install and are far superior to gasket set seals. If you want the best, these are the ones.

Average shipment time is 30 days after order. We custom build these kits after order, they are not sitting on the shelf so be sure to place your order at least 30 days in advance. Don't hassle us about the wait as we do the best we can every day. Much appreciated!

Note 1: Each kit has it's own installed height specification. Only use the spec listed on the card included with your kit. Put the card in a safe location for future reference.

Note 2: This item is intended for hyd roller cams. Do not use on hyd flat tappet applications.

Alex's Parts- An American mom and pop shop~