I own an '87 GXL...Looking for more power and to let my streetported engine breath a little more freely. I was thinking of putting a RB Downpipe on my car, since it's not really noticable without going under the car.



What kind of power gains will I get?

How much back pressure will I lose?

And...how loud is it?? I only have factory exhaust on my car so I would assume some of the sound produced will be slightly muffled, but how does everyone feel about the noise produced by the Downpipe??



Thanks

Brad https://www.nopistons.com/forums/pub...1047683473.gif

Downpipe? Your car isn't a turbo right? Do you mean headers?

I think he means the RB cat replacement pipe which is sometimes called a downpip for some reason?

I mean't the cat-replacement....I think RB calls it a downpipe.

Does anyone have experience with the RB cat replacement/downpipe for n/a???



Is it not state legal only in california???



Need suggestions on power mods...plz.



Brad

THat cat replacement pipe is only streetlegal in areas where there are NO EMISSIONS TESTING!



everywhere else it is illegal

Probably depends on the state. Virginia dictates that you have to have a catalytic convertor but they don't say how many. :]

what about Canada??? How can i find out what kind of restrictions I'm running in to