Originally Posted by 91GT347
Why cant you keep what you have and just run new pipe ? Whats legal on a 71, and on something even 5 years newer can be vastly different. Why exactly are they illegal ? If its just because they dont go to the rear axle, then just run pipe,keep your mufflers,and save money. I know here something that old about anything is legal. Because they didnt come with cats or anything. I would check your local laws before buying something you didnt want in the first place. If your talking about the cherry bomb glass packs. You will gain some performance by going to a flowmaster, Borla, or something of that nature. I know you wouldnt think so. With the straight through design. They cause alot of turbulance inside. Which hinders flow.