SD Performance has spent an extensive amount of time on the dyno, at the track and on the street to develop some of the best performing Pontiac ported cylinder heads on the market today. SD Performance has more 5 Axis CNC Porting and Combustion Chamber Programs for Pontiac heads then anyone and we are constantly working on more and improving existing programs in our never ending search for more pure Pontiac power. All of our heads are flow tested on our state of the art computerized Superflow 600 flowbench equipped with velocity probes, but we’ve learned that what really counts, is how our heads work in the real world. A flowbench is a great tool which we use daily, but there is more to an efficient head than just flow, too many put their faith in flowbench numbers alone.

If you already have a set of Edelbrock heads we can apply all our packages or just porting to your existing heads as well, drop us a line for more details.

NEW!! SD Performance has developed our own 87cc combustion chamber for Edelbrock heads, on a back to back dyno comparison our 87cc chamber required about 2 degrees less timing when compared to the std. 87cc Edelbrock combustion chamber (less timing indicates better combustion efficiency which equates to more power with less fuel required and less chance of pre-detonation). We are also able to custom size chambers from 74-90cc's. If you own a set of 72cc heads and want a larger chamber we can take care of that, give us a call for more details.

All Edelbrock/KRE heads include:(unless stated otherwise)

• Precision honed guides


• High flowing multi angle valve job


• Ferrea, Manley or SI stainless steel valves with multi angle cuts for better off the seat flow


• Chrome moly retainers with 10 degree locks


• Viton seals on intake and exhaust guides, for the best oil control available


• Fully CNC ported intake and exhaust ports


• Notched for 1.65 rockers


• Improved oil drainback


• Flow chart


• ARP 7/16” rocker studs


• Precision assembly - SD Performance precision assembly means, we test ALL valve springs on a digital spring tester, and set ALL installed heights individually to equalize the springs as close as possible.

OPTION: Heart shape chamber available for Edelbrock heads(72cc chamber only) $200.00
Call for more details.

OPTION: Aux. Oil Drain Back holes are a no cost option for all Edelbrock head packages 340cfm and up. Holes (one on each head) are drilled and tapped for 3/8" NPT threads and are right in line with the rear oil drain back hole and exit above the rear exhaust port. (See Pic at the top of the page, AN fitting not included)

Don't Forget, all Aluminum heads will not work with OEM head bolts and require new Head Bolts or Head Studs, we have ARP fasteners in stock from $69.00.