They were used for appx. 2-3k miles, then removed b/c owner went back to stock (I took them off). They do not have springs, but they come with the 2.02" intake and 1.57" exhaust valves, plus titanium retainers and locks. I have never had them flowed, and was not given any numbers, but GTP claims 305/215. The heads are clean, and the port work looks very nice. I have no use for these, so that's why I'm parting with them. I can email pictures to anyone interested.
$1250 shipped to the lower 48.
LS1 GTP Stage 2 Heads
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LS1 GTP Stage 2 Heads
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