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S3XPanther · 12-15-2011, 01:05 PM

So I'm shooting for a spring/summer heads/cam setup for my L99 and I wanted to get your opinions on the use of aftermarket heads.

I recently found these PRC heads being offered from TSP:

http://www.texas-speed.com/p-3200-pr...der-heads.aspx

TSP claims that they flow better than a ported GM LS3 head and can therefore produce 40hp more than ported OEM heads.

I'd like to know if anyone is currently running these on their car, and your thoughts. I'm a little hesitant because I always felt that the quality of the OEM casting was superior to an aftermarket duplicate, but, maybe I'm wrong. After all, TSP and PRC are pretty well known.

Thanks guys.

12-15-2011, 01:05 PM	#1
S3XPanther by Odeon Drives: '12 SS/RS A6 IOM SOLD, '13 1LE IOM Join Date: Nov 2011 Location: Good question Posts: 1,707	Opinions on aftermarket Cylinder Heads So I'm shooting for a spring/summer heads/cam setup for my L99 and I wanted to get your opinions on the use of aftermarket heads. I recently found these PRC heads being offered from TSP: http://www.texas-speed.com/p-3200-pr...der-heads.aspx TSP claims that they flow better than a ported GM LS3 head and can therefore produce 40hp more than ported OEM heads. I'd like to know if anyone is currently running these on their car, and your thoughts. I'm a little hesitant because I always felt that the quality of the OEM casting was superior to an aftermarket duplicate, but, maybe I'm wrong. After all, TSP and PRC are pretty well known. Thanks guys. __________________ "It works 60% of the time, every time." "Some say it's a waste of time, others say it's an incredible waste of time." "The ultimate measure of a man is not where he stands in moments of comfort and convenience, but where he stands at times of challenge and controversy." 2013 IOM SS/RS - 1LE. Born 5/6/2013 (1 of 32 1SS IOM 1LE's)