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"Builders Prep" Heads.
Performance castings big valve 40mm intake x 35mm exhaust valves that are set up for your combo.
If your building a new combo and need a shop to help out with the compression setting and pick out a cam then this is
the head for you. We will hand shape and chase the CC volume in the chamber so you get the exact compression you
want and need with out stacking all the barrel shims under the barrels. If you need help picking and setting the
compression just ask! We will also de burr the chamber to help stop engine detonation. We basically do all the things
you would want a experienced engine and head builder do to your heads before we ship them out to you!
"Builders Prep" Come with these features:
* Dual Port type 1 head
* Performance castings.
* Fits without modifications to your stock sheet metal.
* 3/4" reach 12mm spark plug holes moved up and over to give more meat so there is no chance of cracks.
* Thick solid chamber blocks to dissipate heat and if you want to fly cut the chambers a lot, its no problem.
* Solid rocker blocks so you can't pull out the rocker studs like the old days.
* 3 angle valve job.
* Stainless Steel 40mm intake valve x 35.5mm exhaust valves
* Performance back-cut of the intake valves for extra intake flow and HP. (Stock or CNC heads don't have this!)
* Dual or single High-Rev performance valve springs for that extra rpm protection.
* Light weight chromoly 4130 spring retainers (stronger than stock stamp steel retainers)
* Hardened heat treated valve keepers. (stronger than stock keepers).
* Aluminum-Silicone-Bronze long last valve guides.
* Bore open for 85.5, 87, 88, 90.5, 92 or 94mm free!!
* Hand clean up and open intake port to match stock end castings.
* Complete hand shaped chamber and chase cc to what your combo needs. (up to 65cc chambers if needed)
* Each valve spring is shimmed per your cam and rocker combo for the correct spring pressure.
* All exhaust and intake studs are included.
* Thick Intake gaskets are included.
* 1x set of Heavy duty rocker studs are included.
* Oiled and assembled for true bolt-on out of the box set of heads!
$1199.99 pair complete.
You can add:
* Titanium retainers add $75
Here is the most common size bore and chambers. If they fit your combo you save on a flat shipping fee of only $29.99
90.5/ 92mm with 55cc 90.5/92mm with 60cc 94mm bore with 55cc 94mm with 60cc
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