Active Autowerke BMW B46/B48 F3X 230i 330i 430i and G2X 330e Active AFlow Catted Downpipe

NO PERFORMANCE TUNE NEEDED.

Please note that we install the gasket into the downpipe flange as some customers were damaging the gasket on installation.

NOTE: Fitment applies to US model cars only unless specifically stated. We cannot guarantee fitment to non-US model cars.

Active Autowerke BMW B46/B48 Catted Downpipe 

BMW introduced a new valve-tronic, single turbo version of its direct-injection engine for the later F-Chassis models beginning in 2016 and continuing into the G-chassis models. The Active Autowerke B46/B48 downpipe for the 230i, 330i and 430 helps unleash some of the potential that is restricted by the OEM downpipe.

NOTE: the cutoff build date of 08/2020 is important as cars produced after that date have a downpipe with different bracket locations. Cars with build date of 08/2020 and earlier have the brackets in a V configuration and should order the F-series downpipe while cars with a build date of 09/2020 and later have the brackets in a straight line. If your car was built in the cutover months 08/2020 and 09/2020, please include your VIN in the order so we can ensure you get the correct 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 B46/B48 is quite restrictive, which results in slower exhaust gases and slower turbo spool.

The Active Autowerke F-Chassis B46/B48 Signature down pipe utilizes 3-1/2 inch diameter stainless steel piping in order to provide more power, quicker spool, and extreme durability. We've incorporated a stainless flex joint and then to the ball flare or slip-in pipe to meet the OEM exhaust system.

This variant includes a 4" high flow Active AFlow catalytic converter that will NOT produce a CEL!

The Active AFlow Super High Output Catalytic Converter features full 304 stainless steel construction, including the substrate. Active AFlow Catalytic Converters are EPA registered and compliant in 49 states and fully OBD2 compliant, perfect for use on 1996 and newer vehicles. AFlow 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 Active AFlow Catalytic Converters are rated for engines putting out between 300 and 500 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 for catalytic efficiency when using this downpipe

• Active EPA registered high flow and fully OBD2 compliant

• Casted upper stainless steel V-Band for precise fitment

• 3-1/2 inch diameter piping allows for maximum power output

• Quicker turbo spool

• Rated for 300 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

• Ultra high flow 400 cell per square inch catalyst

• EPA compliant 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

• Active 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) and 2 year / 25,000 Mile Warranty on the Catalytic core to original purchaser only - NOTE: warranty will be null and void if your car has excessive burble (greater than stock) as that physically destroys the catalytic core

  
  

NOTE: Federal law prohibits the tampering of an emissions control device. Mobile Source Enforcement Memorandum 1A, allows for aftermarket parts to be used in the repair or replacement of emissions control systems, provided the emissions aren't adversely affected. There is no mention or reference to cell density or converter volume dimension. The Active AFlow catalytic converter will produce emissions that will meet the standards set by the EPA, not CARB.

Active Autowerke B46/B48 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 Autowerkeu's downpipe, your B46 can rev quicker, and deliver more horsepower and torque.

Minimizing back pressure while retaining daily drive-ability was the goal of our B46/B48 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 3-1/2 inch diameter pipe which utilizes the least number of bends possible. The large volume helps the turbo spool as quickly as possible by eliminating back pressure during spool up. We are ushering in a new era in performance where we maintain air control standards without significant losses in power by using the Active AFlow super high output catalytic converter in our signature downpipe.

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 B46 or B48!

Vehicle information: A vehicle VIN is required to confirm fitment before supplier fulfillment. Please provide your VIN with your order.