have 01 SS with 61000miles, always driven easy, we bought and drivin hard. Changed oil from GM reg to amzoil syn and then changed exhaust, Car has been to redline few times, now smokes when idling after warms up.
Checked comp all about 170-175 except cyl 5 which was 180 and had black fouled plug. I plan to change valve stem seals as first approach, I'd have to any way if I freshen up engine.
Your comments please