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Butler D-Port, 65cc, Hyd. Flat Tappet Aluminum Cylinder Heads w/ Edelbrock Castings, Made in the USA Set/2

SKU: BPI-65cc-EDL-DPort-FT-NP

Need something better than standard out of the box heads? These are built and blueprinted by Butler Performance Pontiac in our shop.

Availability: Current estimated ship time is 2-3 weeks or less

Pricing: $3,495.00

Customize Your Item

Enter cam specs, rocker ratio and brand if known: * required

Choose Your Application

- Choose Your Application -

Choose Retainer Option

- Choose Retainer Option -

* required

Choose Your Valve

- Choose Your Valve -

* required

The stealth option will have the logos removed from the cylinders on end of the heads and over the exhaust ports

Choose Stealth Option

- Choose Stealth Option -

* required

Choose Intake Gasket

- Choose Intake Gasket -

* required

Rocker Slotting

- Rocker Slotting -

* required

Choose your exhaust valve size

- Choose your exhaust valve size -

* required

Qty:

Description

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

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

(D-PORT 65cc Chamber): Flow Numbers as tested by Edelbrock's SuperFlo SF-1020 flow bench @ 28" H2O
Valve Lift	.100"	.200"	.300"	.400"	.500"	.600"	.700"
Intake	65	136	199	237	255	262	263
Exhaust	52	103	130	245	151	157	159

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.

Cylinder Heads

Butler Performance offers many heads from today's top manufacturers such as Edelbrock and more. We only sell heads from names we trust that build high quality heads designed specifically for your application. Here at Butler Performance , we not only provide these heads in the box, but can customize then for your specific application.

Much like rotating assemblies, we do not leave anything to chance. All of our custom cylinder heads go through an extensive multi-step process to ensure they are up to the "Butler Standard". We provide many services such as hand or CNC porting. Our valve jobs are done using Serti equipment for ultra high precision valve seating and valve guides. This equipment is standard in high precision applications such as Formula One Racing and super high performance racing applications.

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

400 Block		Head cc w/-8cc Flat top
Stroke	Bore	72cc	87cc
3.750"	4.155"	10.38	9.02
	4.181"	10.48	9.11
4.000"	4.155"	11	9.55
	4.181"	11.12	9.65
4.210"	4.155"	11.53	10
	4.181"	11.65	10.1
4.250"	4.155"	11.63	10.09
	4.181"	11.75	10.19
4.500"	4.155"	12.25	10.62
	4.181"	12.38	10.73

455 Block		Head cc w/-8cc Flat top
Stroke	Bore	72cc	87cc
4.000"	4.181"	11.12	9.65
	4.211"	11.25	9.76
4.210"	4.181"	11.65	10.1
	4.211"	11.78	10.22
4.250"	4.181"	11.75	10.19
	4.211"	11.89	10.31
4.500"	4.181"	12.38	10.73
	4.211"	12.53	10.86

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