can i put flowmasters on a 2005 pontiac grand prix?

You can put whatever kind of exhaust you want on it but keep these things in mind. Your car has a converter and O2 sensors so removing them will cause the engine light to come on and in some cases rough running and poor economy. If its the GXP with the V8 then I'm pretty sure flowmaster has kits out (CAT BACK). Honestly I would check flowmasters website for a complete kit but if not go to a Reputable muffler exhaust shop and have them weld you some on. Your car anything is possible customize it the way you want!
 
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