Quote:
Originally Posted by ///MPhatic
IMO the down-pipe is the single most important mod on the car. It'll give you a small bump in power, and increase your exhaust volume and artifacts without getting too out of hand. Many guys find that after they replace the down-pipe they don't need to spend $2500 on an exhaust.
There are 2 types:
Catted: more expensive, but much less smell, a deeper tone, and NO CEL.
Catless: slightly more power, much more rasp, and more volume.
IMO if you're not keeping the car you should stop right there because even for a Stage 1 flash you're going to need a charge-pipe, and if you're not wanting to do that, then you're done. But if you are, then the charge-pipe and re-flash to Stage 1 is the next step.
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Wrong. All down pipes are illegal. They change the M2s emissions.