Stock LS1 Dyno Numbers...
I laid down 301.24hp and 311.25ft/lbs stock no lid no catback. I opened my cutout and got 301.18hp and 313.56ft/lbs this was in El Paso, TX the elevation was at the shop was 3200ft+ don't remember the temp. This was last year when I did it. Anyone else??? Oh and I have 2.73's in the rear.
Last edited by IrocZTransAm; Aug 1, 2008 at 10:38 AM. Reason: Made a mistake
Mods: Underdrive pulley, FAST 78, lid, Flowmaster catback no cats, 2.73's, A4 I expected a little better but my car does have 137k on the clock and the weather conditions were not the greatest also I could use some new valvesprings.

But I did dyno it with a SLP Lid and a Magnaflow catback - 320rwhp/325rwtq
Always makes me wonder what it would have been before the lid and catback.
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