High flow catted down pipe (200cel)

[pzz67]

Hi all

I am wanting change my stock downpipes to a high flow catted one.

Does anyone know if
1. The fumes will be eliminated, this is the main reason for me not going for a decatted one

2. I am running an AWE non resonated exhaust, will this cause drone?

3. I have tuned my car with alpinemss stage 2+ but for stock downpipe, if I change to the high flow decatted dp, do I still use this tune? Or can I opt for the tune for the decat dp, since there is better flow now.

I am better off going for a decat pipe and resonated pipe for the awe exhaust in terms of cost, power and proven facts.
However the fumes is what really puts me off.

Thanks

[azn_fcuk]

What fumes?

Lol it's not that bad

[prodigymb]

Originally Posted by azn_fcuk

What fumes?

Lol it's not that bad

catless DPs don't give off smell of fuel ? especially on cold start?

[azn_fcuk]

Originally Posted by prodigymb

catless DPs don't give off smell of fuel ? especially on cold start?

it does, but its very tolerable.
Its not anything near like a diesel roasting coal...

[jayyp]

Originally Posted by azn_fcuk

it does, but its very tolerable.
Its not anything near like a diesel roasting coal...

I beg to differ. I couldn't tolerate it so I swapped out from my Akra DP to AR catted 200 CEL DP. You'll notice the fumes at a stop with windows down. I typically like driving with windows down so couldn't bare it. Catted DP eliminates the smell once they are warmed up.

[mike@x-ph.com]

1- catted will eliminate the fuel smell

2- Do not use catless + non res catback

3- You should be able to keep the same map on stock turbo since you are getting high flow catted DP. Best to check with your tuner.

[drgmt]

What you are actually smelling with Catless pipes is a nice array of cancer causing gases.

[pzz67]

Originally Posted by Modaddict79

What you are actually smelling with Catless pipes is a nice array of cancer causing gases.

enclosed garage shared with others, majority of them older people.
I have to be considerate to them

[Woodengun]

I thought the stock downpipes are high-flow

[pzz67]

Originally Posted by Woodengun

I thought the stock downpipes are high-flow

They are 400 cel if I remember correctly

[M4_MLT]

Originally Posted by jayyp

I beg to differ. I couldn't tolerate it so I swapped out from my Akra DP to AR catted 200 CEL DP. You'll notice the fumes at a stop with windows down. I typically like driving with windows down so couldn't bare it. Catted DP eliminates the smell once they are warmed up.

Agree with you. With windows down and stopped in traffic you could smell your car like a stinky 20 year old vehicle.

I am also thinking to go catted dp or back to stock dp. Right now i have akra dp and akra full exhaust. In my opinion is a little bit too loud too.

Maybe i am getting old

[drgmt]

Originally Posted by pzz67

They are 400 cel if I remember correctly

That's quite restrictive.

Like the idea of a high flow cat. Kind of gives you the best of both worlds:

[prodigymb]

who makes reasonably priced catted DPs?

[mike@x-ph.com]

Originally Posted by prodigymb

who makes reasonably priced catted DPs?

AR Design

[prodigymb]

Originally Posted by mike@x-ph.com

AR Design

for 1500 they don't even have flex joints ...

[mike@x-ph.com]

Originally Posted by prodigymb

for 1500 they don't even have flex joints ...

You wont find any catted DP for M3/M4 for less than that

[Jeff@TopGearSolutions]

Originally Posted by prodigymb

who makes reasonably priced catted DPs?

Evolution Racewerks are on sale this month

[FrankMstein]

$600
https://x-ph.com/arm-motorsports-f87...hoCH7sQAvD_BwE

[mike@x-ph.com]

Originally Posted by FrankMstein

$600
https://x-ph.com/arm-motorsports-f87...hoCH7sQAvD_BwE

[TouringM3]

Originally Posted by FrankMstein

$600
https://x-ph.com/arm-motorsports-f87...hoCH7sQAvD_BwE

Do you have these mounted, if so, how's your experience with them?

I currently have catless downpipes, and would prefer to do less damage to the environment and reduce some of the stench (my wife hates the catless DP smell)

Thanks!
~David

[Alanb97]

Originally Posted by TouringM3

Do you have these mounted, if so, how's your experience with them?

I currently have catless downpipes, and would prefer to do less damage to the environment and reduce some of the stench (my wife hates the catless DP smell)

Thanks!
~David

I have these mounted right now. It was a pretty tight fight and I had to put a tac weld between the downpipe and the flange but besides that they do smell a big during a cold start but the smell goes away pretty quickly. And they also sound great

[TouringM3]

Originally Posted by Alanb97

I have these mounted right now. It was a pretty tight fight and I had to put a tac weld between the downpipe and the flange but besides that they do smell a big during a cold start but the smell goes away pretty quickly. And they also sound great

OK, thanks so much for the feedback!