[radicaldavid]

I'm considering getting downpipes. So there are downpipes that remove the catalytic converter (catless) and ones that don't, is this correct? Are catless ones illegal and ones that don't remove the catalytic converter legal?

Will I pass smog? Also, do people notice that things smell different with catless downpipes?

[Bme30]

Catless for me. And the smell is almost exactly the same as stock. Remember on then coupe you have 2 sets of cats.

[E90Company]

They are both "illegal" in the sense that you are altering your car's emissions system.

[hemi to e90]

i feel like this has been discussed before.

[radicaldavid]

Thanks for the input!

[JLiusifer]

I'm debating on getting downpipes now that I've got my Cobb AP installed. What brand should be get? Whats the best bang for the buck?

[sickem]

guys we've all been new at this at one time or another but you really need to search this stuff before starting new threads.

[MRVBC]

Originally Posted by sickem

guys we've all been new at this at one time or another but you really need to search this stuff before starting new threads.

Amen! ^^^

[enrita]

Originally Posted by hemi to e90

i feel like this has been discussed before.

Really? Never heard of this topic before. How many cats do we have?

[1chanc3]

Originally Posted by radicaldavid

I'm considering getting downpipes. So there are downpipes that remove the catalytic converter (catless) and ones that don't, is this correct? Are catless ones illegal and ones that don't remove the catalytic converter legal?

Will I pass smog? Also, do people notice that things smell different with catless downpipes?

I believe you won't be able to pass emissions test (smog check) in california with a catless system.

[jaykayelemenohpee]

I like cats and dogs.

[paulguma]

Originally Posted by jaykayelemenohpee

I like cats and dogs.