I have a 89 convertable and was wanting a down pipe and hi-flow cat, but on the verts is that exter support brace under the stock pre-cats get in the way? will i have to get a downpipe made for verts or will the SuperFlo System have enough clearence and is it really that much of a high flow system?

 

I don't know about fitment but my GTU has it and it was a great improvement over the stright through downpipe to cat I had before. It got rid of the Ricer Rasp and gave it a great deep throated growl. You could always distinguish my exhaust over a Cibic jollow can sound.

Having the Corksport Single catback helped me see the difference Not a super quiet combo but completely street legal. I passed emmissions easily.