gtp stage 2.5+ 5.3 heads
gtp stage 2.5+ 5.3 heads gtp 5.3 castings done to run on a 4" bore. These are ***** out heads they flowed 318 @600 lift I bought these from a fellow member on the boards about 8-9 months ago and have since sold my car. 2.055/1.60 valves and the heads were setup for a 4.030 bore. 58cc chaimbers. They went 10.59@128.x in a pretty heavy car with a mild solid roller by today's standards. The pockets are opened up for an 1.550" spring. They do have 8mm stem valves. I'll sell these for $800 shipped. I do have pics of them there are no disappointments with these heads. If you have any questions feel free to ask. I have bought and sold many big dollar items here on the board. -Bob
Bump for a good seller! No worries in dealing with Bob. I've seen these heads and they are exactly as advertised. These are the same heads that Jason (from Thunder Racing) went 10.4@128 with (naturally aspirated 348).
Jason
Jason
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springs are good for .650+ lift. I honestly am not sure what the comp ratio would be. I guess that would have a couple of variables, pistons/head gasket thickness. I was looking at around 11.5-11.8.
Last edited by ibepressin; Nov 29, 2007 at 06:17 PM. Reason: spelling
No flowchart but I can guarantee they are a steal at what I am seling these for. Valves, retainers, springs and seats all have less than 1000 miles on them. These are no joke. No dissappointments with these heads.
SOLD!!