BMW Exhaust Parts, Mufflers & Catalytic Converters for BMW 3 Series F31 (2014+)

Clear BMW chassis

Please ensure your correct model is selected

Performance exhaust options from the best BMW aftermarket producers and the most reliable replacement maintenance parts are all at Turner Motorsport. Over time, factory exhaust on the cleanest examples of BMW heritage shows their age. Our factory replacement exhausts are just what you need to keep your favorite car in showroom condition or finish off your restoration. If you are looking for a bump in sound and power, you can also find our performance options like Headers, Downpipes, and Mufflers from Corsa, DINAN, and others on this page.

Sub-Categories

Sort By:

Active Autowerke - Corporate Logo
T#:5886981
Part#: 11-079
Ships in 3 Business Days
$ 1,424.99 USD
Free Shipping
$ 1,424.99 USD
Free Shipping
The Active Autowerke F-Chassis N20 Signature down pipe utilizes 3.5 diameter stainless steel piping in order to provide more power, quicker spool, and extreme durability. 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! 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" GESI cat with 3.50" piping allows for maximum power output Quicker turbo spool - improved power over stock Rated for 350 to 500 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 400 cell per square inch catalyst EPA compliant 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 Covered by 5 Year / 50,000 Mile Warranty (on catalytic converter) Ideal for Forced Induction Applications with no loss of HP Both passengers and drivers are safe from harmful emissions and noise ACTIVE AUTOWERKE N20 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 N20 can rev quicker, and deliver more horsepower and torque. Minimizing back pressure while remaining daily drive-ability was the goal of our N20 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 N20 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 N20!
Show More Show Less
Active Autowerke - Corporate Logo
T#:638760
Part#: 11-065
Ships in 10 Business Days
5% off MSRP $ 1,499.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 1,424.99 USD
Free Shipping
5% off MSRP
$ 1,499.00

MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.

$ 1,424.99 USD
Free Shipping

For over 30 years, Active Autowerke has been the one to turn to for high-quality BMW performance products. Committed to enhancing the performance of BMWs through the highest quality products is what Active Autowerke is all about. 

The B46 downpipes are strategically engineered to virtually eliminate the immensely restrictive characteristics of the factory downpipes – therefore reducing radiant heat and increasing performance.

Features Include

NO CEL when using this downpipe

GESI EPA registered high flow and fully OBD2 compliant

Casted upper stainless steel V-Band for precise fitment

3 inch diameter 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

Ultra high flow 400 cell per square inch catalyst

EPA certified for use on OBD2 vehicles (1996 and newer) except in California

304 stainless steel substrate in catalytic converter is furnace braised to the mantle for outstanding durability

GESi® proprietary precious metal loading technology ensures greatly reduced emissions

Both passengers and drivers are safe from harmful emissions and noise

Precise fitment

Made in Miami, Florida

Covered by 5 Year / 50,000 Mile Warranty (on shell and tube ends)

FITMENT NOTE: For G-Chassis models (G20, G22), the cutoff build date of 08/2020 is important as cars produced after that date have a downpipe with different bracket locations. Cars with a build date of 08/2020 and earlier have the brackets in a V configuration. Cars with a build date of 09/2020 and later have the brackets in a straight line and require Active Autowerke p/n 11-065G

Show More Show Less
Enthusiast Bundles - Corporate Logo
T#:37284805
Part#: 048027LAEBKT
In Stock
Sale - Save 46% $ 743.85

This product was last offered at the strikethrough price on
05-05-2026

$ 399.00 USD
Free Shipping on orders $49 and up
Sale - Save 46%
$ 743.85

This product was last offered at the strikethrough price on
05-05-2026

$ 399.00 USD
Free Shipping on orders $49 and up

B48 Muffler Delete - F30/F31/F32/F33/F36:

Arguably THE BEST modification for your N20/B48. This muffler delete sounds too good to be a 4 cylinder! The combination of N20/B48 and muffler delete surpasses all sound expectations from a 4-cylinder! Impressive direct-fit solution. With this new muffler delete you can transform the sound and driving experience of your f chassis. A simple installation that can be completed with hand tools gives you the ability to take your car to the next level at home in your garage!

The ECS muffler delete removes the heavy and restrictive factory exhaust muffler and replaces it with a high-flow, straight-through exhaust pipe. This adds a louder exhaust note in a simple, cost-effective way without replacing the entire exhaust system and is fully compatible with the OEM rear valance. The muffler delete creates a noticeable increase in exhaust sound and more exhilarating turbo noise, without adding significant drone at cruising speeds. As an added bonus, our muffler delete shaves off 21.0 lbs., weighing in at only 7.0lbs compared to the OEM muffler at 28.0lbs!

YoutTube Sound Clips Featured HERE:

Features and benefits:

Enhanced exhaust tone Simple installation (with instructions!) 21lb weight savings! (Factory muffler 28 lbs, muffler delete 7 lbs!) Tip adjustment capability ​ Slide farther on for left and right adjustment Rotate for verticle adjustment Good looking and durable 304 stainless steel construction Heavy-duty fabricated sheet metal exhaust hangers Dual staggered tip exhaust tips (integrated) Installation and Support:

Installation is as easy as cutting, placing into position, and clamping! Tools you might want for the job: Exhaust hanger removal pliers - T379176 Exhaust pipe cutter - T385451 - CLICK HERE FOR INSTALLATION INSTRUCTIONS -

High-Performance Ignition Service Kit - Gen 1 B48/46 2.0L:

High performance ignition kit for your Gen 1 B46/48 featuring spark plugs, Turner high performance ignition coils and dielectric grease to make sure you have no issues at your next maintenance interval!

Our BMW ignition coils are designed with performance and efficiency in mind. An engine needs 3 main components to run (Air, Fuel, Spark.) Turner ignition coils are modified to increase energy output; more energy output results in a faster, more efficient and consistent burn to make sure your fuel is being utilized to its maximum potential. Our signature Turner ignition coils feature a blue housing that give your engine the performance and aesthetic your looking for.

Ignition coils should be changed every 40,000 - 60,000 miles and are an important maintenance item due to the essential role they play in your engines health, performance and efficiency. Choose Turner Ignition Coils to keep your engine running strong and healthy.

Features and Benefits:

Increased performance New spark plugs and grease Direct fitment Signature Turner Blue ignition coils

Show More Show Less

Packaged by Turner - Corporate Logo
T#:55857771
Part#: 026732TMS03KTKT2
Ships in 6 Business Days
New Item
$ 279.99 USD
Free Shipping on orders $49 and up