Butler D-Port, 72cc, Hyd. Flat Tappet Aluminum Cylinder Heads w/ Edelbrock Castings, Made in the USA Set/2

Butler Performance built heads with Edelbrock castings

Our Heads feature Edelbrock bare casting cores with all machine work done in our head shop. They are fitted with Ferrea Valves, new guides, Comp Cams Springs, Comp locators, Comp Retainers and Locks. They can optionally be slotted to accept 1.65 rockers if needed.

These heads are custom built per order by Butler Performance

These heads are custom built per order by Butler Performance

Cam Specs- Supplying known Cam Specs are recommended so we can verify the spring setup.

Application- Choose your application so we can verify the head ordered has the proper components for your application

Retainer- Choose standard Chromoly, Titanium or PAC Brand Titanium with Pac Locks

Valves- Choose from Ferrea 5000 (Street Performance) or 6000 (Competition Grade) Valves

Stealth- This is the option where we remove logos from the end of the heads and above the exhaust port. Optionally can be painted

Intake Gaskets- Choose to add intake gaskets

Rocker Slotting- We can slot the pushrod holes to accommodate the angle needed for 1.65 ratio rockers

Exhaust Valve Size- Choose standard size 1.66 or upgrade to 1.77

Why Edelbrock Castings?
Butler has had the opportunity over the years to have our own brand castings. The decision was easy for us. Due to the amount of metallurgy expertise needed and inconsistencies in foundries, we chose THE experts in the industry that stay on top quality and consistency. They have proven this through years in the performance aftermarket cylinder head and intake business. Here are a few reasons why the Edelbrock casting, Butler Process machining, high quality parts, and expert blueprinting and assembly, there is no other head on the market that comes close.

• Sand Metal Casting, Core Production, Pattern Making, Heat Treating, Engineering, and Machining all in house, Made in the USA
• Choice of CNC Machined Combustion Chamber, Hand Polished, or casted chamber*   on select BP and BP Ported Heads
• More flow than other aluminum heads on the market, right out of the box before CNC porting
• Capable of being CNC ported up to 325cfm and D-Port and 340cfm on Round port
• Don't miss the details- Heli-Coiled Bolt Holes
• Heli-Coil inserts in rocker stud holes to protect threads during torquing.
• Heli-Coil inserts in exhaust bolt holes to protect the threads while installing and removing headers

They feature optimized oil return passages for increased oil flow. These heads are available in three heart shaped combustion chamber sizes, 72cc and 87cc. The 72cc and 87cc chambers are fully CNC’d to provide a 9.5:1 compression ratio when used with flat-top pistons. The spark plug has been relocated closer to the exhaust valve for improved performance. These heads are cast with extra thick port walls and a compact port size, making them ideal for CNC and hand porting. Complete cylinder heads include guide plates, rocker studs and high quality valvetrain for direct bolt-on application.

Compression Ratio Numbers for Reference (Compression ratio with Block, Head, and Stroke with -8cc FT)

Click Here for our compression calculator for other variations such as bore, gasket thickness, decking, and piston types and volumes