the impala has a upraded PCM 2.5" GM performance catback dual exhaust. 2.5" ZZP downpipe, u-bend delete, ER rockers, 105 # springs, fender well intake, high velocity plenum spacer, monte carlo cluster. his next mod is the L67 swap, but he needs a different tranny to handle the swap. youve prolly seen it its a 01 galaxy silver impala. ive done all the work on it. its fast as hell