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Active Autowerke Signature downpipe for BMW N55
ACTIVE AUTOWERKE

Active Autowerke Signature Downpipe — N55

$1,805.00

Active Autowerke catted downpipe for the N55 — the gating restriction opened, without going catless. Clears the factory downpipe/cat choke point while keeping a high-flow converter in the pipe — the street-friendly path into Stage 2.

Construction

3.5" 304 stainless with a 4.5" GESI G-Sport Ultra High Output catalytic converter — full stainless through the substrate, EPA-registered, 49-state / OBD2, no CEL. Not California-legal.

Where it fits in the build

Downpipe-side core of an N55 Stage 2 build; we tune around it. The Stage 2 Kit — N55 bundles the matched parts + calibration for 8% under à la carte.

Fitment

BMW N55 — M235i (F22/F23), 335i (F30/F31), 435i (F32/F33/F36), and F87 M2, 2014 and up. Confirm your chassis in the selector.

Fits engine N55
Fits chassis F22 · F30 · F32 · F87 · F10 · F25 · F26
Category Exhaust
Manufacturer Active Autowerke
What this is

A Part Recalibration is one focused revision built around the part you just bought. We take logs on your car as it runs now, on your current tune, then make a single full revision so this specific part delivers what it should. Hardware only does its job with a calibration shaped around it.

We bundle that tuning with the part right here, whatever brand the hardware is. If you want a fresh start across all your hardware, a Full Tune is the step up: a new base map, three revisions, and a written report.

This is a bootmod3 calibration. We tune through your own active BM3 license, so you'll need bootmod3 active on your car to load it.

Ships freight from Boca Raton, FL — additional fees may apply at checkout.

Step up to a Full Tune?

You've added a Part Recalibration to more than one part. At that point a complete tune does more for you: a Full Tune lays down a fresh base map and three revisions so all of your new hardware is dialed in together, with a written report at the end. We can roll your recalibrations into one Full Tune for $395 — below our standalone Full Tune, which starts at $495 for a four-cylinder and $595 for a six.

The Full Tune is a bootmod3 calibration — it loads through your active BM3 license, the same one you confirmed for the recalibration.
WHY WE SHIP ACTIVE AUTOWERKE
Active Autowerke has been building hardware for BMW for a long time, and that history shows in supercharger systems and exhausts that are engineered to a specific chassis rather than adapted to it. We carry their hardware because the depth of platform knowledge behind it tends to mean the kit fits and the supporting components are accounted for. On the naturally-aspirated platforms where a supercharger is the clean route to a real power increase, this is established, proven hardware. We reach for it when a customer wants a forced-induction path with a long track record behind it.