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it comes in a bunch of sizes, goto magnaflow.com. The 91000 series is just the proper setup for a protege so you don't throw a CEL and/or fail emissions
It won't be that much louder. It's less restrictive which is what you want throughout your entire exhaust. The 91000 series is what Magnaflow told me to use on a 95-6 protege. You may want to call them since you're a 97-8, just to make sure.
that was the first one without the sensor, and that is at 2" would it be possible to get a 2 1/2? or would I need to match up the size from the header pipe?
How would pulling out the cat and just throwing in a straight piece of pipe effect the car? Wouldent that offer maximum flow? I'm sure its not exactly legal... but i dont have emissions here and its not like a cops going to go up under my car and see it.... :D
"The only thing worse than bad memories, is no memories at all" - The Dismemberment Plan
you'd throw a nasty CEL. Your car would go into "safe" mode, and wouldn't be much fun to drive.
edit: fox, I would say use all 2" piping, the size is fine. If you're really hellbent on going larger, take it to a shop and see what your options are. I'm pretty sure you can do 2.5" cat on 2" from the header to a 2.5" midpipe, but the piping from the header would need to be expanded.
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