If you put a big pipe in place of the x-pipe, that would give the exhaust a big hollow expansion chamber in the middle, effectively making it sound like a teen boys "fast and the rediculus" honda civic with the 6" pipe sticking from under the rear bumper... Not the sound I'd be going for. I'd start with the x-pipe (2.25" is the closest bigger size to the oem metric pipes) then to get louder add a quality aftermarket muffler in place of the oem ones.

And all that is if you don't want to spend the money on bolt on kits.

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"When you do things right, people won't be sure you've done anything at all" (Bender, futurama)

You make something idiotproof, they'll make a better idiot

You think professional is expensive, just wait until you pay for amateur.

Never let your sense of morals prevent you from doing what is right.

Examine what is said, not who speaks.

X5 pics

RIP 4.6is.....

2003 4.6is