MAX OUTPUT II SPRING KIT

Drop In Valve Spring Kit, SB FORD GT40

Application: Hydraulic Roller, up to .600" Lift w/ 130 Lbs Seat Pressure.

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

   Fitment:

• This kit comes w/ parts to fit OE .393" & .481" tip length valves.
• Kits can be customized for .393"/.393" tip length valves. Select this option when using our Gt40p-393 and Gt40p-393-A stainless steel exhaust valves.
  

We're expanding our Max Output series into three variations; Max Output I, II & III

This kit is from our Max Output II series.

It sports a custom made high output drop in spring with increased seat and open pressures as well as a full .600" lift range.

This kit fills a void in drop in springs, it offers dual spring pressures all in a drop in design- No need to machine the heads.

Perfect for cams calling for higher loads.

This Max Output II kit works with cams w/ up to .600" lift and up to around 250 degrees duration @ .050" (not to be confused with advertised duration which is always a higher number, use the duration @ .050" figure)

For those who love the cackle of a thumping cam, we've got you covered!

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      Average Spring Specifications:

• 1.487" Outside Diameter
  
• Fits over stock SB Ford .995" Stepped Spring Base
• 130 Lbs @ 1.765" Installed Height (see note * below)
  
• 326 Lbs @ .500" Lift
• 337 Lbs @ .525" Lift
• 348 Lbs @ .550" Lift
• 359 Lbs @ .575" Lift
• 370 Lbs @ .600" Lift
• Max Lift- .600"
• Single Spring w/ Damper
• Average Coil Bind @ 1.110"
  
• Spring seat machining not needed to use this spring
  

     Kit includes:

• Eight Intake Retainers and locks, labeled for easy identification
  
• Eight Exhaust Retainers and locks, labeled for easy identification
• 16 Drop in springs
• Specification Sheet
• Installed Height Specification

     Fitment:

• Vsk7m-48-M comes with parts to fit factory .393/.481" tip length valves.
• To customize this kit for .393"/.393" tip length valves, use the appropriate check box at the top of the page. Select the .393"/.393" option when using our new Gt40p-393 or Gt40p-393-A stainless steel exhaust valves- Now available!
  

Recommendations- Measure valve spring height during installation and shim as required.

Note * Each kit comes with it's own target installed height specification card. For the best results, use the installed height specification included with your kit.

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