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Is the npp from a zl1 the same as on a SS or 1LE? Which one do you recommend me getting for my 2010 SS? Also which rear diffuser would I need and GM part number for it. Right now I have SLP long tube headers and high flow cats exiting to a SOLO exhaust. Car is loud but not to loud, but has a rasp to it that I don't like. No drone on highway which is good. It also is supercharged with a SLP supercharger. My question is, can I put the factory exhaust manifolds and cats back on with the NPP exhaust. Want to get it sounding to factory as much as possible. Don't mind losing some power. I also get a smell of exhaust in the car from time to time. Car was dyno at 540HP and 542ft/lbs of torque so even if I lose 25hp that's ok. What do you guys think?
Thanks
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