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If you don't get the exhaust first you will probably have some kr (knock retard) You also have to get the tool to emove the pulley. my brother did his by having a person from washington grand prix club use his tool. The tool costs 150 I think. My brother also did his pulley before exhaust, and it seemed to run alright. I'd just be afraid of too much kr. It's a pretty safe mod though, and the difference is huge.
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1992 Sentra SE-R: Bluebird SR20DET @ 10psi, 3" exhaust, FMIC, Poly-Urethane Motor Mounts, Centerforce (slipping) Clutch, Tein SS coilovers, FSTB, RSTB, 205/50/15 Hankook RS2's
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