Performance parts.

[91OldsDOHC]

There are lots of parts for the 3.1 actually. The 3.3 never did get much support from what I saw but the 60V6 engines have more support than most know about.

[darkfox]

i recommend you swap in another engine. 3800 s/c or a nice FWD V8 would be a good bet.

[mn95gtp]

you might wanna hit up WOT-Tech: 60V6 Performance they have some things in there ye. Than you might be able to get headers from OverkillEngineeringMotorsports.com but they will take a while for them to be made so patience is needed. you can hit up and exhaust pros and they might be able to bend you a custom cat back and get a set of mufflers from magnaflow thatll fit. for a cat hit up flowmaster or magnaflow, whichever fits. just do some looking around you'ld be amazed on what you can find. check out The BEST Source For All Your GM 60ºV6 Needs they have many topics on these kinds of engines.