Quote:
Originally Posted by ArthurJGuy
I wouldn't bother for warranty work, there is nothing that removing or gutting the cats will damage, and the worst they could do is void the warranty on your exhaust, but you already have aftermarket, so who cares?
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Are you sure? My fear is ill take the car in for a routine oil change with the aftermarket test pipes, etc installed and BMW will make note of it and then in the future if the engine has a catastrophic failure, even if I replace the xpipe to stock, they will have record of exhaust mods and therefore void the engine warranty.