E7s vs. Gt40s

steveofire · October 27th, 2011, 04:09 PM

lol I am gonna say that these are the gt40p heads which has a slight difference in the exhaust ports if i remember correctly

93Lx.Conv5.0 · October 27th, 2011, 04:13 PM

Yeah now that I know alittle about both and can tell the difference in them I'll determine it when I get them, but will shorty headers fit on Gt40p heads.?

steveofire · October 27th, 2011, 05:28 PM

no stock 5.0 headers wont fit the p heads u would have to get a set of gt40p headers for ur stang do a google search I have seen a lot running the frpp headers 1979-93 Mustang Ford Racing Stainless Steel Shorty Headers for GT40p Heads, M-9430-P50 at LRS - Same Day Shipping!
you should be able to find a used pair for cheap though

93Lx.Conv5.0 · October 27th, 2011, 06:24 PM

i don't have stock headers. I have bbk shorty headers

fogged306 · October 27th, 2011, 06:40 PM

Originally Posted by steveofire

lol I am gonna say that these are the gt40p heads which has a slight difference in the exhaust ports if i remember correctly

The P's are different if a few more ways than that. The chambers are smaller, shaped different, and the spark plug was located more in the center. Which is why a lot of people run into header issues, because the angle of the spark plug will aim almost directly at the next cylinders primary tube on certain headers. The exhaust valves were smaller on the P's too, but they still outflow the regular GT-40 heads. Which I'm sure is due to port shape being different like you mention, but I've never compared or seen a comparison of the actual shape done so I can't verify that.

steveofire · October 27th, 2011, 06:52 PM

^ true but to be able to run them on the car I think the only thing he would have to do is get a different set of headers to compensate for the spark plugs I used to have on 01 explorer with a 5.0 and man it was so nice changing the plugs on that thing with the way the stock headers were going right through the fender

steveofire · October 27th, 2011, 06:56 PM

93Lx.Conv5.0 · October 27th, 2011, 08:28 PM

CHECK OUT THE PLEASE HELP thread for me guys I'm in desperate need of help

mustangmaniac95 · October 28th, 2011, 09:37 AM

gt40p heads will have a small p on the side of them, and like others say, the p heads have a different spark plug shape..i kmow MAC makes headers for p heads

93Lx.Conv5.0 · October 28th, 2011, 03:00 PM

yeah i've heard that the P heads give people alot of headaches dealing with tune ups and wire clearance

October 28th, 2011, 09:37 AM	#29
mustangmaniac95 Hardcore Enthusiast 1995 Mustang GT Join Date: Nov 2010 Location: New Orleans Posts: 1,192 iTrader: 2 reviews	gt40p heads will have a small p on the side of them, and like others say, the p heads have a different spark plug shape..i kmow MAC makes headers for p heads __________________ 95 GT: JLTcai, Flow40s, o/r Xpipe, lowering springs, cobra brakes, cobra rims, sbfc, shocks/struts, trickflow170 heads (1.6rr), cobra intake, custom cam, 75mm MAF, 75mmtb, bbk shorty headers, 24#injectors, 3.73 gears, mach 1 chin spoiler.

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October 27th, 2011, 04:09 PM	#21
steveofire Regular 1994 Mustang Cobra Join Date: Mar 2011 Location: Minnesota Posts: 185 iTrader: 0 reviews	lol I am gonna say that these are the gt40p heads which has a slight difference in the exhaust ports if i remember correctly

October 27th, 2011, 04:13 PM	#22
93Lx.Conv5.0 Regular 1993 Lx Mustang Conv. Join Date: Oct 2011 Location: Detroit Posts: 271 Blog Entries: 1 iTrader: 0 reviews	Yeah now that I know alittle about both and can tell the difference in them I'll determine it when I get them, but will shorty headers fit on Gt40p heads.?

October 27th, 2011, 05:28 PM	#23
steveofire Regular 1994 Mustang Cobra Join Date: Mar 2011 Location: Minnesota Posts: 185 iTrader: 0 reviews	no stock 5.0 headers wont fit the p heads u would have to get a set of gt40p headers for ur stang do a google search I have seen a lot running the frpp headers 1979-93 Mustang Ford Racing Stainless Steel Shorty Headers for GT40p Heads, M-9430-P50 at LRS - Same Day Shipping! you should be able to find a used pair for cheap though

October 27th, 2011, 06:24 PM	#24
93Lx.Conv5.0 Regular 1993 Lx Mustang Conv. Join Date: Oct 2011 Location: Detroit Posts: 271 Blog Entries: 1 iTrader: 0 reviews	i don't have stock headers. I have bbk shorty headers

October 27th, 2011, 06:52 PM	#26
steveofire Regular 1994 Mustang Cobra Join Date: Mar 2011 Location: Minnesota Posts: 185 iTrader: 0 reviews	^ true but to be able to run them on the car I think the only thing he would have to do is get a different set of headers to compensate for the spark plugs I used to have on 01 explorer with a 5.0 and man it was so nice changing the plugs on that thing with the way the stock headers were going right through the fender

October 27th, 2011, 06:56 PM	#27
steveofire Regular 1994 Mustang Cobra Join Date: Mar 2011 Location: Minnesota Posts: 185 iTrader: 0 reviews

October 27th, 2011, 08:28 PM	#28
93Lx.Conv5.0 Regular 1993 Lx Mustang Conv. Join Date: Oct 2011 Location: Detroit Posts: 271 Blog Entries: 1 iTrader: 0 reviews	CHECK OUT THE PLEASE HELP thread for me guys I'm in desperate need of help

October 28th, 2011, 03:00 PM	#30
93Lx.Conv5.0 Regular 1993 Lx Mustang Conv. Join Date: Oct 2011 Location: Detroit Posts: 271 Blog Entries: 1 iTrader: 0 reviews	yeah i've heard that the P heads give people alot of headaches dealing with tune ups and wire clearance

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