Active Autowerke F3X 230i/330i/430i B46 GESI Downpipe

The Active Autowerke Signature B46 downpipe is for the four-cylinder F-chassis BMW 230i, 330i and 430i. It uses 3.5 in stainless piping, a 4 in GESI high-flow catalytic converter and a stainless flex joint, and it ships with the turbo flange gasket already fitted.

The B46 responds well to a freer exhaust, and the factory downpipe is the main restriction after the turbo.

This variant includes a 4" high flow GESI catalytic converter that will NOT produce a CEL! GESi HO-Series Gen 2 Catalytic Converters are EPA registered and compliant in 49 states and fully OBD2 compliant, perfect for use on 1996 and newer vehicles. GESi proprietary precious metal loading technology ensures greatly reduced emissions, eliminating most "Check Engine Lights". 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. NO CEL when using this downpipe GESI EPA registered high flow and fully OBD2 compliant EPA compliant for use on OBD2 vehicles (1996 and newer) except in California

What It Does

Replacing the downpipe lets the turbo spool quicker and helps a tuned B46 make more power, with a deeper, sportier sound than stock. It is one of the most effective bolt-ons for these cars.

Materials and Construction

TIG-welded 304 stainless steel with a cast stainless upper V-band, a flex joint and a ball-flare or slip-in end that meets the factory exhaust. Active Autowerke fits the turbo flange gasket in the flange before shipping.

Features

• 4 in GESI high-flow cat
• 3.5 in stainless piping with flex joint
• Turbo flange gasket pre-installed
• Cast stainless upper V-band
• Bolt-on, no cutting or welding

Specs

• Part number: 11-065 (B46)
• Brand: Active Autowerke
• Type: catted downpipe
• Catalyst: GESI, 4 in, 400 cpsi
• Engine: BMW B46 2.0L turbo inline-four
• Shipping weight (Active Autowerke): 30 lb (13.6 kg)

Fitment Notes

• This is the B46 version. Active Autowerke sells a separate B48 version (11-108) and lists the G2X 330e on that page; contact us for the 330e.
• Active Autowerke covers the shell and tube ends for 5 years / 50,000 miles and the catalyst core for 2 years / 25,000 miles, for the original buyer. The warranty is void if the car runs excessive burble (more than stock), because that physically destroys the catalyst core.
• Active Autowerke states fitment for US-model cars only.
• Questions before you order? Call or text (310) 231-0292 or email Online@AutoTalent.com.
• Shop all Active Autowerke downpipes, every catted downpipe we carry, or the full Active Autowerke range.

FAQ

Is this a catless downpipe?
No. It has a high-flow catalytic converter built in.

Do I need a tune?
A tune is recommended to get the most from any downpipe. Ask us if you are unsure which tune suits your car.

Will it fit a G20 330i?
No. G-chassis cars use the Active Autowerke G2X B46 downpipe.