Thread: gt40 vs gt40p
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Old 08-08-2003, 02:24 PM   #2 (permalink)
Registered Member
Join Date: Jul 2000
Location: Norman, Oklahoma, USA
Posts: 597

You should definately go for the GT40 P heads. They actually flow better than the GT40 iron heads. I know, it sounds weird, but there have been many flowbench tests done on these heads. The revised spark plug location makes the fuel burn much better and also creates a bit of a swirl in the chamber for fuel mixing. And besides, you can buy a set of GT40P's from me for $200 plus shipping. The GT40 iron heads are much more expensive. If you're interested in a set of the P heads, email me at

Michael Black
Norman, OK

1984 LX Hatch
306 w/ TRW forged flat toppers, Comp Cams Magnum 292H, GT40P heads w/ 3 angle valve job, .550 lift springs, Angus Racing Roller Rockers, Weiand Stealth Intake, Holley 4150 650cfm carb, MAC 1 5/8 Long Tubes, Single Chamber Flowmasters, 91' T5 w/ Pro 5.0 shifter, Turbo Coupe 8.8 Rear w/ 3.55 gears, QA1 Motorsports tubular K member, no interior except steering wheel and seat.
Coming soon: 6 or 8 point cage, Fuel Cell, Weld Draglites
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