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      08-07-2013, 08:22 PM   #1
AlphaAlpineM6
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Arrow Downpipes

Just ordered my AMS catless downpipes from Malek at MRF Engineering.

If it amplifies the current exhaust sound by a marginal amount I might pass on a aftermarket catback exhaust system like the super-duper expensive akrapovič.

If anyone has just catless downpipes on their car, can you describe the differences in sound and power over stock.

As for the check engine light, will the akrapovič "delete R check engine light suppressor" work?

Thanks - Alpha
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      08-07-2013, 08:31 PM   #2
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Did you grab a pair of microcats to avoid a CEL? I'm really interested in how this setup sounds... I bet it will be nice.
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      08-07-2013, 09:22 PM   #3
AlphaAlpineM6
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Quote:
Originally Posted by Hunter5179 View Post
Did you grab a pair of microcats to avoid a CEL? I'm really interested in how this setup sounds... I bet it will be nice.
No it's a catless system
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      08-08-2013, 08:46 PM   #4
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Talking

I got the catless AMS downpipes (in addition to other stuff that add sound/power like grouppe M air intake and akra exhaust). Have to say the downpipe is the only mod I've made that made a HUGE difference in power. However, the sound in VERY loud (embarrassing as I live in a stuffy condo building) and there is a strong smell of gas (owing to going catless). But I would do it all over again because in addition to the power, it feels like the turbos are always spooled and good to go, and the lag is gone in any gear at any rev. Worth the price but installation will take 4ish hours (I did it at a dealership and cost $1000+). Car sound post akra and gruppe M was a subtle change, the AMS catless downpipe took it to a whole new level. It would be my only mod if I had to pick one.
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      08-08-2013, 09:56 PM   #5
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Have to agree DPs are the best bang for your buck. Stick with catted, no CEL, 10hp difference, no smell and still plenty loud but not obnoxious. My dealership did it and charged me $600 for the install.

Noushy
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      08-08-2013, 11:05 PM   #6
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Quote:
Originally Posted by noushy View Post
Have to agree DPs are the best bang for your buck. Stick with catted, no CEL, 10hp difference, no smell and still plenty loud but not obnoxious. My dealership did it and charged me $600 for the install.

Noushy
I agree....
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      08-09-2013, 11:56 AM   #7
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Quote:
Originally Posted by noushy View Post
Have to agree DPs are the best bang for your buck. Stick with catted, no CEL, 10hp difference, no smell and still plenty loud but not obnoxious. My dealership did it and charged me $600 for the install.

Noushy
I ordered catless so too late
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      08-09-2013, 12:49 PM   #8
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Quote:
Originally Posted by AlphaAlpineM6 View Post
I ordered catless so too late
You should by the micro-cats for your catless setup.
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      08-09-2013, 04:05 PM   #9
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Whats the cost on these?
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      08-15-2013, 10:32 AM   #10
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I have decat with akrapovic and sound is MASSIVE!

You can listen to the before decat with akras and the after here:

BEFORE Decat :




AFTER decat :
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      08-15-2013, 10:36 AM   #11
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and here :

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      08-15-2013, 11:55 AM   #12
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Nice vids dreamer.
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      08-15-2013, 03:27 PM   #13
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AMS catted downpipes being installed now. Pics, vids, before/after dyno results to follow...
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      08-15-2013, 03:47 PM   #14
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Quote:
Originally Posted by F12M6MD View Post
AMS catted downpipes being installed now. Pics, vids, before/after dyno results to follow...
Interested to hear the results, no cat back exhaust only the downpipes? No tuning? Just downpipes and stock exhaust?

These are the numbers I want to know about
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      08-15-2013, 05:57 PM   #15
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Quote:
Originally Posted by dentaltech
Quote:
Originally Posted by F12M6MD View Post
AMS catted downpipes being installed now. Pics, vids, before/after dyno results to follow...
Interested to hear the results, no cat back exhaust only the downpipes? No tuning? Just downpipes and stock exhaust?

These are the numbers I want to know about
I have cat-back Meisterschaft GTC and carbon filter delete. So not gonna help your cause much. Sorry.
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      08-17-2013, 10:18 AM   #16
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Beating up on that poor little girl in the GTR.. shame on you...
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      08-17-2013, 10:19 AM   #17
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Joking aside, what's your 1/4mile times with and without the mods you've done? From the video, looks wicked fast!
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