Fits Factory Heads, machining not required.

Max Output I Beehive Valve Spring Kit for SB FORD GT40 w/ Hyd Flat Tappet

Application: Hydraulic Flat Tappet Cams up to .560" Lift, 110 Lbs Seat Pressure

Fitment: GT40 302 heads w/ Staggered tip length valves in the OEM lengths of- .393" Intake and .481" Exhausts

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

Special Limited time Sale price!

We've been building these for a while but have not added them to the site until now.

A beehive spring kit for GT40 heads w/ a flat tappet cam is something you don't see everyday!

This will work with a wide range of hyd flat tappet cams, mild to hot profiles up to .560" lift is no problem.

We get allot of questions as to what makes beehive springs so desirable, folks want to know whats up with these unique shaped springs?

There are several benefits but lets focus on the obvious advantage: Reduced Reciprocating Weight! (RRW)

Anything which helps the spring open and close with less resistance will improve the "valve control factor". For the same reason many race engines use titanium retainers, using small beehive retainers and a lighter "top side" of the spring offers the potential to increase power.

Since the top of the spring is way smaller than the bottom, it uses a tiny retainer which is way lighter than a traditional spring retainer, the difference in weight alone improves the springs ability to control valve action throughout the RPM range.

Max Output I .560" beehive springs work with hyd flat tappet cams with up to around 248 degrees duration @ .050" (not to be confused with "advertised duration" which is always a higher number)

As with all our other drop in kits for Gt40, machining is not needed for proper installation.

We do recommend the installed heights are measured and shimmed (as needed) to obtain the target installed height. (we include a target installed height spec sheet with every kit) [See Note 1 below]

Suitable for 1.6, 1.7 or 1.73 ratio rocker arms as long as the lift does not exceed .560" @ the valve.

If you need help determining if these will work with your cam, use the "message us" link and include the cam brand and part number; we'll get back to you with an answer. (Be sure not to typo your email address though... you'd be surprised how often this happens- we can't answer if your email is wrong)

Max Output I Pacaloy Beehive Springs were manufactured to Alex's specs here in the USA- an Alex's Parts exclusive which you won't find anywhere else.

      Specifications:

• Top OD: 1.055"
• Top ID: .652"
• Bottom OD: 1.405"
  
• Bottom ID: 1.005
• Fits over factory stepped spring base w/o machine work
  
• Seat Load- 105 Lbs @ 1.830"- Valve Closed Installed Height [See Note: 1 below]
  
• Open Load @ .500" Lift: 289 Lbs.
  
• Open Load @ .560" Lift: 312 Lbs.
  
• Rate- 368#
• Spring seat machining NOT needed
  
• Springs are good to .560" w/ an additional .060" travel range beyond .560" (safety margin)
  
• Parts are labeled for Intake and Exhaust positions
  

     Kit includes:

• Sixteen Chrome Moly Steel Beehive Retainers
  
• Hardened Valve Locks
• 16 Drop in Beehive Springs
• Spring Spec Sheet
• Installed Height Target Spec

     Fitment:

• Staggered tip length SB Ford GT40 heads w/ .393"/.481" Tip Length Valves
  
• Or- Heads w/ aftermarket .393"/.393" valves including Ford racing .383"/.383" tip length valves should click the .393"/.393" option check box.

Suggestions: Measure spring installed heights to make sure it is correct. An installed height mic for beehive retainers is required.

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 would be them.

Note 1: Each kit has it's own installed height specification. Only use the target height listed on the spec card included with your kit. Put the card in a safe location for future reference. Once the kit is built, installed height is matched to that particular kit- this information will not be available from us after it has shipped.

Note 2: This item is intended for hyd flat tappet cams. For beehive springs for Hyd Roller, see our other spring kits.

Note 3: Be sure the cone area of the retainer is clean and keep dust/debris away from locks/keepers. Dirty parts will affect installed heights by more than one might expect.

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