Is anyone running ONLY a midpipe with a comp stock exphaust w/no tune?

[luckym3girlnj]

Considering AA or Fabspeed, looking for suggestions, is anyone running ONLY midpipe with no tune or no downpipes?

[icegrill]

Yes it's pretty subtle, but nice tone increase overall.

[E92M3GT]

Originally Posted by icegrill

Yes it's pretty subtle, but nice tone increase overall.

Originally Posted by icegrill

Yes it's pretty subtle, but nice tone increase overall.

+1

[jlspeed29]

would this void a warranty? or inhibit the ability to pass smog?

[TopJimmy]

Originally Posted by jlspeed29

would this void a warranty? or inhibit the ability to pass smog?

A midpipe or a full exhaust will not void your warranty. You need to keep a valved exhaust or your computer will get error codes if valve cables are left unplugged. That's still not a broken warranty situation.

What causes emission test failure is swapping out the OEM catted downpipes for hi-flow cats or catless. Some people do the swap but try and use "defoulers" to avoid the O2 sensor error (still likely, our downstream sensors are sensitive). A sure fix is an O2 Sensor "simulator".

The OEM Cats on the F80/82 already flow pretty good. If inspection is an issue keep them. All you really need is the midpipe or mid+rear section.

[mike@x-ph.com]

Originally Posted by luckym3girlnj

Considering AA or Fabspeed, looking for suggestions, is anyone running ONLY midpipe with no tune or no downpipes?

We ran the AA mid on the shop's M4 for a while with everything else stock.

you'll get a deeper tone with no rasp with a single midpipe. the exhaust will be slightly louder but not by much