M4 comp pack exhaust

[***M4***]

I have m4 w comp package exhaust I was thinking of adding the dinan high flow mid pipe for better sound any one do this? Do u like? Any other recommendations? I want it to be able to pass emissions otherwise I would do cat less down pipes. Thanks

[exia_m3]

Originally Posted by ***M4***

I have m4 w comp package exhaust I was thinking of adding the dinan high flow mid pipe for better sound any one do this? Do u like? Any other recommendations? I want it to be able to pass emissions otherwise I would do cat less down pipes. Thanks

You will be fine removing the secondary cats with t he dinan midpipe, but if you go catless dp you will not.

[mray]

Depends what sound level you like. I have a turner mid pipe and I imagine the results would be similar to a Dinan. It basically makes the burbles and pops about 25% louder, when letting off the gas at low RPM's, but with general driving its about 10% louder, until you mash it in sports plus then its about 20% louder. In my opinion. I didn't feel like it was enough so put a Milltek rear attached the the mid pipe, I prefer this set up. I posted video's over the weekend on the forum..

[***M4***]

Originally Posted by mray

Depends what sound level you like. I have a turner mid pipe and I imagine the results would be similar to a Dinan. It basically makes the burbles and pops about 25% louder, when letting off the gas at low RPM's, but with general driving its about 10% louder, until you mash it in sports plus then its about 20% louder. In my opinion. I didn't feel like it was enough so put a Milltek rear attached the the mid pipe, I prefer this set up. I posted video's over the weekend on the forum..

So u think it definitely added to your comp pack exhaust as far as good sound?

[LOW4LYF]

Do a Remus or AA mid pipe.... and u will love it. Dinan is sweet as well but u keep the second cats.

[Draper]

Are you subject to a visual inspection in CT?

On my E90 M3 I had a full Akra EVO (small secondary cats only). Surprisingly I actually passed the sniffer test (just barely) but failed the visual inspection since the emissions sticker stated the car was supposed to have 4 cats.

[***M4***]

Originally Posted by Draper

Are you subject to a visual inspection in CT?

On my E90 M3 I had a full Akra EVO (small secondary cats only). Surprisingly I actually passed the sniffer test (just barely) but failed the visual inspection since the emissions sticker stated the car was supposed to have 4 cats.

I don't know if CT will do a visual inspection or not that would be the plus side of going with the Dinan mid pipe the cats would be left on and in place.

[lewz4]

Originally Posted by xenof80

You will be fine removing the secondary cats with t he dinan midpipe, but if you go catless dp you will not.

The Dinan midpipe actually retains the secondary cats, and removes only the resonator!

[mray]

Originally Posted by ***M4***

So u think it definitely added to your comp pack exhaust as far as good sound?

Yes it added to the comp pack, but the Dinan removes a different component, mine removed secondary cats, not the resonator so its not apples to apples..

[Daxos]

What are you trying to do? Add more sound? How much sound are you trying to add? Are you willing to compromise warranty?

[SflBimmer8484]

Sounds good to me

[mike@x-ph.com]

Originally Posted by Figurka

Do a Remus or AA mid pipe.... and u will love it. Dinan is sweet as well but u keep the second cats.

+1 for the AA midpipe

[***M4***]

Originally Posted by mike@x-ph.com

+1 for the AA midpipe

Can u pass emissions with AA mid pipe?
Do u have to cut oem pipes to install?

[mike@x-ph.com]

Originally Posted by ***M4***

Can u pass emissions with AA mid pipe?
Do u have to cut oem pipes to install?

All midpipes will need to cut exhaust unless you do a full catback ... AA midpipe will pass OBD emission test, but might fail visual(if your state does visual) because it removes the secondary cats


In Vegas they only do OBD test, no visual