Performance Cylinder Heads

Aluminum heads are in the works - call for information.

Super/Street Steel Heads @ $1,395

Specify 76cc, 120cc, or 425 heads. Shot-tumbled, magnafluxed, surfaced, and assembled. Intake and exhaust ports are matched to our premium gaskets. Pushrod walls on the intake side are moved back. Ports are smoothed, blended, and polished (the last 1½"). Bronze guideliners are installed, and three angle seats are cut. Super/Street heads are assembled using oversize 21-4N stainless valves (2.19/1.90 for 76cc, 2.11/1.77 for 120cc and 425 heads), special spring shims, performance valve springs (single w/ damper), Chromoly retainers, and hardened valve locks. Valves are not "back cut" to ensure maximum longevity.

PRO/Street Steel Heads @ $1,695

Specify 76cc, 120cc, or 425 heads. See ‘Super Street’ Heads above. With more port work and polished combustion chambers.

PRO/Comp Heads @ $2,195

76cc Heads. As above, PRO/Comp cylinder heads also feature fully worked ports, your choice of 2.19 or 2.25 intake valves, spring cups, dual valve springs, lightweight chromoly retainers, and hardened valve locks.

Bulldog Aluminum Heads (limited Availability)

This new design head is cast from 355 aluminum and heat treated to T-6 standards. Utilizing stainless steel 2.19 intake/ 1.90 exhaust valves, it will offer flow numbers out of the box that will rival the 2.25 valve PRO/Comp heads. The original heater hose outlet location will be center-drilled on both ends of both heads to simplify installation and provide multiple options.

The new heads are designed to use both the current design stock and shaft rockers, as well as stud mount rockers and guide plates. Of course, we have worked closely with the manufacturer to ensure the maximum benefit of all new aluminum castings, incorporating features often requested by customers, and have done our best to keep them compatible with existing intakes, valve covers, exhausts manifolds and headers, etc.., as well. Bronze guides, spring seats large enough for 1.550 diameter springs, and lighter weight are some of the many benefits for this new design. The aluminum heads are currently available with a 76cc combustion chamber. Stock Accessory bolt holes and raised valve cover rails are also incorporated to make installation hassle free.

Bare Heads @ $1695
(valve seats and 11/16 guides installed)
Add our tried and true assembly kit: 2.19/1.90 stainless valves and 1.42" street springs, etc.: $300

Assembled Heads @ $2195
(Assembled by mfg w/ 2.19/1.84 stainless valves and 1.55" dia. springs)

*Assembled heads: Assembled heads include valve job, guides, valves installed, spring pressure/installed height set, etc.. All street heads (unless otherwise specified) will be assembled using the same tried and true 21-N stainless swirl polished severe duty valves we have been carrying for years, and the same springs included in our larger street cam kits. As with the ported stock heads, the purchase of assembled heads and a cam kit together qualify for a $100 credit. In that case, heads will be assembled with the appropriate cam kit springs.

Ported versions available - Call for info and pricing