For more info email me at: hitechcobra@yahoo.com

GT-40x specs (stock, no porting):

Intake - 240 cfm at .550" lift, Exhaust - 170 cfm at .500" lift.  These are stock numbers. 

I have read 10% gains can be expected with mild porting.  These heads have awesome porting!  I can't guarantee it but I think it would be easy for these heads to flow 264 intake @ .550 and 187 exhaust @ .500.  Having said that, I will have them flow tested.

Gt-40X Cylinder Heads-Ported

Asking: $1350 (NEW)

Retail Price: $1075 heads & $180 valve train, $1500 stage 3 porting

Part #M-6049-X302 Bare Heads

Part #M-6090-X302 Valve Train Kit

64cc Chamber

•Ported by one of the top Winston Cup shops in Charlotte, NC.

•I have $1,500 invested in the porting work alone.  Included with the heads: Comp Cams stud conversion package: Part #4504-16

McLeod Bellhousing

Asking $300 (USED)

Summit price: $463.39

Part # 8660, Fits Ford 289-302-351 Using T-5, Tremec 3550 and TKO

Call me at (904) 703-4580 for more info.  Or email me at: hitechcobra@yahoo.com

I have over $2,600 invested in these ported GT-40x heads.  Hand Porting was done by a Master Head Porter who works on Winston Cup/Busch engines in Charlotte, NC.  I choose GT-40X’s for their excellent port velocity (torque generation) characteristics. Valve train is Ford part # M-6090-X302.  This package includes everything to assemble the heads.  Valves, springs, retainers, and the Comp Cams Stud conversion studs.