Ok right now my whole 87 camaro z-28 is stock i want to change the exhaust,what brands are good i want it to sound really loud

 

Are you referring to headers or a cat-back? Headers, you might want to go with Hooker Headers or Edelbrock. Unless you'll be building up serious HP in the future then Edelbrock will be fine. SLP is the best, but pricey. As far as cat-backs. Flowmaster and Hooker seem to be among the most popular. There are sound clips of both on the board, I think Hooker sounds better, but that's my opinion. Plus I think it comes with cooler tips. Don't quote me on this until I find the exact post, but Hooker Aerochamber out flows the flowmaster, however, there was one muffler that outflowed the Hooker but I forget which.

 

http://www.holley.com/HiOctn/ProdLin.../ESM/Aero.html

here are the flow charts.

 

Well i was thinking of both but i dont really have a lot of money so probably just the caback for now

 

Personally, I would get headers first, they're the bigger restriction.