Yup, you'll need a PCM, 3" D/P, and one range colder plugs to help control KR you'll be getting from the pulley. KR will kill your HP.
Here's my dyno sheet from last year. KR killed my horsepower. This was with a 3.4", PCM, CAI, U-bend delete, and Flowmaster 40's.
I've since installed 3" D/P and colder plugs. Butt-dyno notice a huge difference. Haven't had a chance to get back on an actual dyno, yet.
_________________________
Bobby
Died 5/1/08, resurrected 5/15/08
ASCD SD hood, 17" Bullitts, Overkill PCM, 3.4" Pulley, NGK TR55IX, K&N 9" cone filter, JimmyC D/P, U-bend removed, Flowmaster 40 series, Hooker big bore tips with resonators, S/B brake lines, drilled/slot rotors, GMPP handling kit, KYB struts, F&R strut supports, HID's, LED's, 2.5" Air Dam, red GTP overlays on custom badges, white rear insert.
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