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TMASTER · 08-09-2003, 01:35 AM

I think the GT40 Iron heads are better for me. There flow data is almost exactly the same as the GT40P's
look:
http://www.jason.fletcher.net/tech/f...a/castiron.htm
My set i have burns the fuel perfect!... gold strap with slighty blue half way.... the dyno A/F was right on 12:1

1. GT40 heads can use normal headers, the P's have to have special headers...$$$
2. GT40 heads work with the factory smog lines, and the P's do not accept factory emissions.
3. GT40 heads have larger Exhaust valves from factory.

just my opinion

And i got a pair for $425, that had $600 worth of work done to them brand spanking right outta the machine shop.

08-09-2003, 01:35 AM	#4
TMASTER Registered Member Join Date: Sep 2002 Location: TEXAS Posts: 161	GT40's I think the GT40 Iron heads are better for me. There flow data is almost exactly the same as the GT40P's look: http://www.jason.fletcher.net/tech/f...a/castiron.htm My set i have burns the fuel perfect!... gold strap with slighty blue half way.... the dyno A/F was right on 12:1 1. GT40 heads can use normal headers, the P's have to have special headers...$$$ 2. GT40 heads work with the factory smog lines, and the P's do not accept factory emissions. 3. GT40 heads have larger Exhaust valves from factory. just my opinion And i got a pair for $425, that had $600 worth of work done to them brand spanking right outta the machine shop.