The Official Downpipe/Test Pipe/Race Pipe Thread

[Spectrum24x]

Sorry for the noob question but is the cat in the downpipe the only cat on the car? If its not the only cat is it possible to pass emissions with a Catless dp?

[greatdane68]

It's not the only cat, and no, you can't pass emissions with a catless DP.

[gyoku2006@gmail.com]

good thread, very helpfull for when i get around to installing an exhaust system

[VertigoM]

Who has the new catted CS downpipe? Does the divorced wastegate design have a significant benefit over a bellmouth design?

[VertigoM]

Anyone?

[93silvergt]

Exhaust Downpipe Mazda 07 08 09 Mazdaspeed 3 Cat-less | eBay

Does this "m2 performance" have the secondary o2 bung extended to avoid a CEL? I can't see from the pictures

[Speed3eak]

Originally Posted by 93silvergt Exhaust Downpipe Mazda 07 08 09 Mazdaspeed 3 Cat-less | eBay Does this "m2 performance" have the secondary o2 bung extended to avoid a CEL? I can't see from the pictures

Yes you can, And no it doesn't.

Do you have a 1/2" drill bit? Order some spark-plug non-foulers and make the extender yourself. It's really simple and works like a charm.

Does anybody make a 3" v-band upper downpipe for the MS3? I haven't been able to find one. The old style UR DP looks like it was made for a 3" v-band but knowing UR they would most likely charge extra for a non-standard option. It doesn't look like the MS3 flange -> v-band adapter would work either because I'd be working with a very limited amount of space.

[EddyV1987]

Hey Guys quick question,

I have a MazdaSpeed 6 that has a Corksport racepipe and CBE. I'm looking into getting a downpipe but I can not use Corksports because they are Catless. With good ol Connecticut law I can not run catless. Will these other downpipes be compatible with what I'm running now? Will it make the car sound like Crap?

[smoogs12]

Originally Posted by EddyV1987 Hey Guys quick question, I have a MazdaSpeed 6 that has a Corksport racepipe and CBE. I'm looking into getting a downpipe but I can not use Corksports because they are Catless. With good ol Connecticut law I can not run catless. Will these other downpipes be compatible with what I'm running now? Will it make the car sound like Crap?

Just go catless and run a couple non-foulers on the second o2 sensor.

Tapa

[chuckms6]

it depends on how conneticut does emissions testing, visual, code scan, or sniffer, or all three?

[smoogs12]

Originally Posted by chuckms6 it depends on how conneticut does emissions testing, visual, code scan, or sniffer, or all three?

We only do a scan in CT.

If the tech is a reaaal dick he might visual check. But most give no fucks.

[chuckms6]

Originally Posted by smoogs12 We only do a scan in CT. If the tech is a reaaal dick he might visual check. But most give no fucks.

oh. then catless and delete code in ap. if they check system readiness then go with the o2 sensor spacer.

[smoogs12]

...if they check system readiness....

This they do. Dont go in after clearing codes or pulling power to the car. You will fail

[chuckms6]

Originally Posted by smoogs12 This they do. Dont go in after clearing codes or pulling power to the car. You will fail

fersure lol. yea o2 spacer is the way to go.

[09Speed3Z]

@Raider.......this isn't a sticky anymore??

[Raider]

Not sure whathappened, but it is fixed

Discuss::
http://www.mazdaspeedforum.org/forum/foru...-thread-99627/