I have an 02 Silverado, 5.3L v8, 150(ish)k - I've never done any repairs with anything other than OEM, so this is a new realm to me. I'm going to be replacing my y-pipe with cats to the tips, water pump, and plenum. The current plan for the plenum is Edelbrock, but the water pump and exhaust I have no idea. I would LOVE some suggestions though!