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M2 Technical Topics > N55 Engine / Drivetrain / Exhaust / Bolt-ons / Tuning > Active Autowerke N55 Catted Downpipe, No CEL Guarantee!

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      11-21-2019, 04:28 PM   #1
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Talking Active Autowerke N55 Catted Downpipe, No CEL Guarantee!



ACTIVE AUTOWERKE BMW N55 DOWNPIPE
BMW introduced a new valvetronic, single turbo version of its direct-injection engine for the F-Chassis models beginning in 2012. The Active Autowerke N55 downpipe for the M235i, 335i, 435i and M2 helps unleash some of the potential that is restricted by the OEM downpipe.

Turbochargers are powered by spent exhaust gases created during the combustion process. The quicker these gases are evacuated, the better. Unfortunately, the factory down pipe in the N55 is quite restrictive, which results in slower exhaust gases and slower turbo spool.

The Active Autowerke F-Chassis N55 Signature down pipe utilizes 3.5” diameter stainless steel piping in order to provide more power, quicker spool, and extreme durability.

This variant includes a 49-state legal EPA approved 4.5" high flow GESI catalytic converter that will NOT produce a CEL! EPA N/GBL/4389/1119

FEATURES:
  • NO CEL when using this downpipe
  • Designed to be as unrestrictive as possible
  • GESI EPA approved
  • High flow 4.50" GESI cat with 3.50" piping allows for maximum power output
  • Quicker turbo spool
  • Rated for 500 to 850 hp applications
  • Withstands up to 1500° F
  • Can reach operational efficiency within 9 seconds of startup
  • Easily bolts-on – no cutting or welding required
  • Durable construction from TIG welded 304 stainless steel
  • Precise fitment
  • Modular design for later upgrades
  • Made in Miami, Florida
  • ACTIVE AUTOWERKE N55 SIGNATURE DOWNPIPE BENEFITS


The speed of a turbo’s impeller wheel is limited by exhaust back pressure. A larger down pipe relieves some of this pressure, resulting in quicker and more efficient spool. With Active Autowerke’s Signature downpipe, your N55 can rev quicker, and deliver more horsepower and torque.

Minimizing back pressure while remaining daily drive-ability was the goal of our N55 downpipe. Owners can now upgrade to a product that is affordable, reliable, and easy to install.

After months of research and development, our engineers settled on a 3.5” diameter pipe which utilizes the least number of bends possible. However, the Signature N55 down pipe still fits easily into the OEM location, with a painless installation process.

Constructed entirely from 304 stainless steel with 1.5MM wall thickness, we are confident that you’ll be pleased with how robust and durable this down pipe is. Trouble-free installation and a long lifespan ensure that you’ll enjoy many miles of performance with your N55!

Last edited by mike@x-ph.com; 01-02-2020 at 06:44 PM..
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      11-21-2019, 09:25 PM   #2
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Will this work as a replacement for the catless DP that came with the AA Signature Turboback Exhaust?
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      11-22-2019, 10:58 AM   #3
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Quote:
Originally Posted by Spartan King View Post
Will this work as a replacement for the catless DP that came with the AA Signature Turboback Exhaust?
It should but i'll confirm with Active and let you know asap!
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      11-22-2019, 01:00 PM   #4
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Quote:
Originally Posted by Spartan King View Post
Will this work as a replacement for the catless DP that came with the AA Signature Turboback Exhaust?
Downpipe will work with Active Autowerke exhaust
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      11-22-2019, 01:55 PM   #5
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What's in the guts? Is the cat a 200 cell? 300 cell? Is it an HJS? Another manufacturer? Do they have dynos?
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      11-22-2019, 05:25 PM   #6
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Quote:
Originally Posted by BruceM View Post
What's in the guts? Is the cat a 200 cell? 300 cell? Is it an HJS? Another manufacturer? Do they have dynos?
Looks like this one or similar based on the specs from the description of the AA dp

https://www.verociousmotorsports.com...tic-Converters
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      11-22-2019, 06:12 PM   #7
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Did I miss the price?
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      11-22-2019, 09:13 PM   #8
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I’d like to know pricing also.
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      11-23-2019, 03:22 AM   #9
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Quote:
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Did I miss the price?
$999 according to AA website
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      11-23-2019, 11:41 AM   #10
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Originally Posted by Godfather2112 View Post
I’d like to know pricing also.
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      11-25-2019, 11:21 AM   #11
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Nice!! I like AA and having more competition in this area benefits us all.
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      11-25-2019, 12:01 PM   #12
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Nice!! I like AA and having more competition in this area benefits us all.
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      01-19-2020, 12:28 PM   #13
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      01-27-2020, 04:01 PM   #14
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Does the DP come with the new V-band clamps or is that something we have to purchase separately?
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      01-28-2020, 11:28 AM   #15
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Quote:
Originally Posted by tenkies View Post
Does the DP come with the new V-band clamps or is that something we have to purchase separately?
Per Active's website, the B58 comes with a new Vband. They do not mention a new one for the N55
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      02-03-2020, 01:56 PM   #16
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Anyone have experience with this thing? Doesn't seem too different from Fabspeed's, and the price is certainly attractive. Thanks in advance!
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      02-03-2020, 04:10 PM   #17
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Quote:
Originally Posted by brianpdx View Post
Anyone have experience with this thing? Doesn't seem too different from Fabspeed's, and the price is certainly attractive. Thanks in advance!
Its one of the most popular mods since its release. We have not had a single issue with it
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      02-13-2020, 03:21 PM   #18
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Quote:
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Its one of the most popular mods since its release. We have not had a single issue with it
Good to hear !
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