SKU: 68762643265

Active Autowerke Catted Downpipe w/ G-Sport Cat - BMW / N55 / F3X M235I / 335I / 435I / F87 M2

Sale price$929.16 Regular price$1032.40
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Ships within 48 hours · Estimated delivery Jul 18 - Jul 23

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Description

Active Autowerke Catted Downpipe w/ G-Sport Cat - BMW / N55 / F3X M235I / 335I / 435I / F87 M2BMW 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


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 4.5" high flow GESI catalytic converter that will NOT produce a CEL! 

The GESi® G-Sport Ultra High Output Catalytic Converter features full 304 stainless steel construction, including the substrate. GESi® UHO-Series Catalytic Converters are EPA certified in 49 states and fully OBD2 compliant. GESi® proprietary precious metal loading technology ensures greatly reduced emissions, eliminating most "Check Engine Lights". These high flow catalytic converters outperform stock converters and provide a reliable solution to the most common catalytic converter problems.

The GESi® UHO-Series Catalytic Converters are rated for engines putting out between 500 and 850 horsepower while maintaining a high flow capacity. The reduced back-pressure from this high flow catalytic converter will allow you to maximize your engines horsepower without the harmful emissions. Say goodbye to Check Engine Lights and failed emissions tests!

Please Note: These catalytic converters are not legal for use on vehicles registered in the state of California as a result of California Vehicle Code Section 27156 and 38391.

 

Features:

  • NO CEL when using this downpipe
  • Designed to be as unrestrictive as possible 
  • GESI EPA registered high flow and fully OBD2 compliant 
  • High flow 4.50" GESI cat with 3.50" piping allows for maximum power output
  • Quicker turbo spool - improved power over stock 
  • 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
  • Ultra high flow 300 cell per square inch catalyst 
  • EPA certified for use on OBD2 vehicles (1996 and newer) except in California 
  • Full 304 stainless steel construction 
  • 304 stainless steel substrate in the catalytic converter is furnace braised to the mantle for outstanding durability 
  • GESi® proprietary precious metal loading technology ensures greatly reduced emissions 
  • Ideal for Forced Induction Applications with no loss of HP 
  • Both passengers and drivers are safe from harmful emissions and noise 
  • Covered by 5 Year / 50,000 Mile Warranty (on catalytic converter)

 

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 68762643265

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★★★★★ 4
Great watch
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Great everyday watch—lightweight, easy to read, and does everything I need without being complicated.
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Reviewed in the United States on April 7, 2026
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Regina L. Oldaker
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★★★★★ 5
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Color: Black/Digital/Black/Yellow
Very nice watch.
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Reviewed in the United States on May 3, 2026
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Ellen and Stephen
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★★★★★ 5
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Color: Gray/Digital/Gray
I absolutely love my Timex Ironman watches. I have had many over a very long period of time. Wonderful set of functions for the price. Very affordable. Easy to use. Lasts a long time. Very easy to read in standard lighting. I like the Indiglo when needed, but do not use it too often. Absolutely love the ability to set a repeat timer to remind me to do something at a fixed interval, or to keep me on task for a fixed period of time. Great to be able to set three independent alarms. Potential to capture a huge number of splits with the stopwatch. I purchased this watch to replace a similar model with a dead battery. I have replaced batteries in the past, but it is quicker and easier to buy a replacement watch. I am saving my old watches for that day in the future when the Ironman model may no longer be available. I expect this will be my watch of choice for the rest of my life.
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