GT-40 , 289/302 & 351W Factory Ford Heads
Ford Cast Iron GT-40 Cylinder Heads
The GT-40(P) cylinder head is popular for classes that must run a stock Ford production head.
Like other stock castings, there is plenty of room for improvement with this head.
Stock air flow on this head tops out at 190 cfm intake and 128 cfm exhaust.
When "UnderCover Ported", the GT-40 head will flow 202 to 210 cfm intake and 145 on the exhaust side.
| UC-GT40 | "UnderCover Porting" to GT-40 heads | 995.00 labor only to 1 pair of heads |
Small Block Frod 289/302 Cylinder Heads
The Ford 289/302 heads were available with many different valve sizes.
We have reworked several sets of these heads for applications where no porting is allowed.
Stock air flow intake is 166 cfm. With "UnderCover Porting" the intake side is improved to 190 cfm.
The same 1.780" intake valve was used in each test.
On the exhaust side improved from 124 cfm to 137 cfm with "UnderCover Porting". The valve size for the exhaust was 1.450".
| UC-289 | "UnderCover Porting" to 289/302 Ford heads. | 895.00 labor only to 1 pair of heads |
CNC Sportsman Porting to 351W Heads
Porting the factory Ford 351W heads is popular for road racing classes. A stock 351W cylinder heads will flow in the 160 to 170 range on the intake side and just below 130 cfm on the exhaust. With our CNC Sportsman Porting the intake air flow improves to 210 cfm and the exhaust will flow 160 cfm.
| SMAN-351W | CNC Sportsman Porting to 289/302 or 351W style castings. | 1,595.00 labor only to 1 pair of heads |
| 351W-SMAN | 351 Factory 351W castings with CNC Sportsman Porting. | Bare, Pair. 1,995.00 |
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