Which version of the AFlow Catted Downpipe for F3X do I need?

Match the option to your engine code, B46 or B48, and check the build date. BMW moved the downpipe brackets from a V to a straight line at the 08/2020 to 09/2020 cutover, and the B46 option here is the V-bracket design. Active Autowerke asks for the VIN on cars built in those two months.

Does the downpipe need a tune?

No. Active Autowerke sells the AFlow Catted Downpipe for F3X and G2X cars as a no-tune part and states it will not produce a catalyst efficiency code on factory software. A tune can use the extra flow, and the 300 to 500 horsepower converter rating leaves headroom for one.

Why is the gasket already installed?

Active Autowerke fits the turbo flange gasket into the downpipe flange before shipping because some customers damaged the gasket during installation. Seated at the factory in Miami, it cannot be pinched or lost while the cast V-band clamp is tightened at the turbo.

Will it set a check engine light?

Active Autowerke states that the AFlow converter will not set a catalyst efficiency code. Its 400 cell stainless substrate reaches operating efficiency within 9 seconds of startup, which keeps the downstream oxygen sensor reading a working catalyst from early in each drive.

How does it connect to the factory exhaust?

A cast stainless V-band clamps the downpipe to the turbo, and a stainless flex joint behind the converter takes up engine movement. The outlet meets the factory exhaust through its original ball flare or slip-in joint, so no cutting, welding or adapter pipe is needed.

Description

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Description

Active Autowerke AFlow Catted Downpipe for F3X and G2X BMW 230i, 330i, 330e and 430i

Active Autowerke’s AFlow Catted Downpipe for F3X and G2X BMW 230i, 330i, 330e and 430i swaps the factory B46 or B48 downpipe for 3.5 inch 304 stainless tubing and a 4 inch Active AFlow converter rated for 300 to 500 horsepower, comfortably above what these engines make on factory software. A cast stainless V-band locates it at the turbo, and Active Autowerke presses the turbo gasket into the flange before shipping, after customers damaged loose ones during fitting. It is the value pick of the pair; the GESI Catted Downpipe for F3X and G2X adds the straight-bracket version for later G-chassis B46 cars.

Features

Active AFlow converter with a 304 stainless substrate furnace brazed to the mantle
EPA registered and OBD2 compliant converter
Active Autowerke states it will not set a catalyst efficiency check engine light
Cast stainless upper V-band and stainless flex joint
Turbo flange gasket supplied pre-installed in the downpipe flange
No performance tune needed, and no cutting or welding
TIG welded 304 stainless steel, made in Miami, Florida

Specifications

Piping diameter: 3.5 in
Wall thickness: 1.5mm
Converter diameter: 4 in
Catalyst cell density: 400 cpsi
Rated output: 300 to 500 hp
Heat tolerance: Up to 1500F
Light-off time: Within 9 seconds of startup

Applications

BMW 230i: F22 / F23 | 2017-2021 | 2.0L B46 / B48
BMW 230i: G42 | 2022-present | 2.0L B46 / B48
BMW 330e: G20 | 2.0L B46 / B48
BMW 330i: F30 | 2017-2019 | 2.0L B46 / B48
BMW 330i: G20 | 2019-present | 2.0L B46 / B48
BMW 430i: F32 / F33 / F36 | 2017-2020 | 2.0L B46 / B48
BMW 430i: G22 / G23 / G26 | 2021-present | 2.0L B46 / B48

Notes

The B46 option of the AFlow Catted Downpipe for F3X fits cars built through 08/2020; G-chassis B46 cars built from 09/2020 take the 2021-on version sold as part of the GESI Catted Downpipe for F3X and G2X
Choose the B46 or B48 option to match the engine code on your car
Built for US-model cars only
Warranty is 5 years or 50,000 miles on the shell and tube ends and 2 years or 25,000 miles on the catalytic core, for the original purchaser, and is void if the car is tuned for more burble than stock

Frequently Asked Questions

Which version of the AFlow Catted Downpipe for F3X do I need? Match the option to your engine code, B46 or B48, and check the build date. BMW moved the downpipe brackets from a V to a straight line at the 08/2020 to 09/2020 cutover, and the B46 option here is the V-bracket design. Active Autowerke asks for the VIN on cars built in those two months.
Does the downpipe need a tune? No. Active Autowerke sells the AFlow Catted Downpipe for F3X and G2X cars as a no-tune part and states it will not produce a catalyst efficiency code on factory software. A tune can use the extra flow, and the 300 to 500 horsepower converter rating leaves headroom for one.
Why is the gasket already installed? Active Autowerke fits the turbo flange gasket into the downpipe flange before shipping because some customers damaged the gasket during installation. Seated at the factory in Miami, it cannot be pinched or lost while the cast V-band clamp is tightened at the turbo.
Will it set a check engine light? Active Autowerke states that the AFlow converter will not set a catalyst efficiency code. Its 400 cell stainless substrate reaches operating efficiency within 9 seconds of startup, which keeps the downstream oxygen sensor reading a working catalyst from early in each drive.
How does it connect to the factory exhaust? A cast stainless V-band clamps the downpipe to the turbo, and a stainless flex joint behind the converter takes up engine movement. The outlet meets the factory exhaust through its original ball flare or slip-in joint, so no cutting, welding or adapter pipe is needed.

About Active Autowerke

Active Autowerke was founded in Miami, Florida in 1981 by brothers Mike and Karl Hugh as a BMW service shop, and turned to performance in late 1995 when Karl, a University of Miami engineering graduate, led its first M3 and 325i turbo kits. Supercharger kits for the E36, E46 and E9X followed, and its Signature Equal Length mid-pipe is protected by US Patent 11248511 and European and UK Patent 3882441.

Additional Information

The Bulletproof Automotive website contains many thousands of products purchased in multiple different currencies. All of the prices are entered manually and accurately at the time of entry. Due to the consistently fluctuating international exchange rates, at times prices may not be able to be honored at their original intended rate. We apologize for any inconvenience this may cause, unfortunately our website is unable to compensate dynamically for what can at times be volatile changes in the cost of items due to currency values fluctuating, changes in prices from suppliers, changes in shipping and import duties, and other factors. Rest assured that any order you place on line will be at zero risk to you in this area. If in the event your order cannot be fulfilled at the original intended website price we will offer you a 100% refund, no questions asked. We will continue to do our best to maintain updated prices and we will always continue to offer our price match guarantees as well to ensure our prices are always the best for you. In short, prices may change without notice. It is always advised to give us a call prior to placing your order online to confirm availability and to confirm current pricing.

Shipping Policy

Items that are in stock in the US, either at Bulletproof’s warehouse or at a supplier’s warehouse, are generally delivered within 7-10 days. Special order items from overseas take considerably longer. As a courtesy Bulletproof offers delivery estimates to our customers which take into consideration manufacturer availability and shipping schedule. These estimates represent our best guess based on previous orders from the manufacturer and do not in any way imply a guaranteed delivery window. Many manufacturers work in a “just in time” inventory system and often take 2-20+ weeks to produce an item once an order is submitted. All deliverable items are then sent to our Japanese warehouse. Bulletproof ships a minimum of one full ocean freight container every month from Japan, oftentimes more than one a month. Ocean freight takes an average of 4 weeks. Typically it breaks down to one week in Japan for paperwork and customs, two weeks by boat and one week in US customs/clearance. Due to the wide number of variables between manufacturer and shipping schedules, delivery estimates are simply just that – estimates. We attempt to estimate conservatively and we usually deliver faster than our estimates suggest. It is not Bulletproof’s policy to guarantee delivery time of any special order item, this is impossible for us to do. By ordering you acknowledge that there is no required delivery ETA and an order may not be canceled or altered due to manufacturing or shipping delays, all ETA’s are provided as a best guess only. Please review the full Terms & Conditions here.

BP Pricing Difference

We do pricing a little differently on our JDM brands and we believe in making things simple and clear. No hidden fees or surcharges. Every price you see includes the shipping cost to our office in Los Angeles, California and all the associated taxes/duties/fees for bringing the products into the US. The only shipping you ever pay is from our facility in the US to your location. Be wary of resellers that don’t include the cost of international shipping in their pricing on JDM parts. While we believe we’ll always have the lowest all-in price on JDM products, we offer a price match guarantee for all authentic parts purchased from authorized dealers as well. For many international customers, it’s much more affordable to ship from the USA than from Japan directly, as the air freight and ocean freight costs are typically much less. However, for customers looking to ship directly from Japan outside of North America, or domestically in Japan, we can provide pricing specifically for that scenario. Please do not hesitate to contact us with any pricing questions or concerns. Please email us at sales@bulletproofautomotive.com with any inquiries.

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Active Autowerke AFlow Catted Downpipe for F3X and G2X BMW 230i, 330i, 330e and 430i

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Active Autowerke AFlow Catted Downpipe for F3X and G2X BMW 230i, 330i, 330e and 430i

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Frequently Asked Questions

About Active Autowerke

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