OVERVIEW

The Evolution Racewerks Competition Series 4" Catless Downpipe is built for the BMW B46 four-cylinder turbo engine and fits 2016 and newer 230i, 330i, 430i, 530i, X3 30i and X4 30i models. Replacing the restrictive factory catalytic converter and downpipe frees up exhaust flow, which Evolution Racewerks measures at 14 to 16 whp and roughly 20 wtq on stock boost, rising to over 24 wtq with a software upgrade. Gains vary with the rest of the vehicle's modifications.

The downpipe uses mandrel bent 4" piping and 100% stainless steel construction, TIG welded in house. The turbocharger V-band flange and the ball joint flange are CNC machined, and the ball joint interior is straight-flow rather than the factory press-formed shape. A stainless steel flex section is retained so the exhaust system can move without loading the turbocharger and manifold, and the improved factory-style "ball" V-band connector keeps the part compatible with the factory or an aftermarket exhaust.

The B46 engine is found in all U.S. spec cars. This downpipe is different from the one used on the B48 engine found in EU / Asia spec cars, and the two are not interchangeable. You must order the correct downpipe for your car.

SPECS

Horsepower gain: 14 to 16 whp average (varies with vehicle modifications)
Torque gain: 20 wtq average on stock boost, up to over 24 wtq with a software upgrade
Higher maximum horsepower curve
Higher initial torque curve; torque arrives sooner, higher and holds longer
Improved throttle response and faster turbo spool up
Mandrel bent 4" piping for a smooth transition into the exhaust system
100% stainless steel construction
100% TIG welded
Precision CNC machined turbocharger V-band flange
Precision CNC machined ball joint flange with straight-flow interior
Stainless steel flex section, as used by the factory, for proper exhaust movement
Retains the factory "ball" type V-band connector, redesigned for better flow
Finish: mirror polish or brushed
Optional high temperature black thermal coating to reduce underhood temperatures
Optional additional O2 sensor bung for a wideband sensor, supplied with a pre-installed plug
Optional EGT sensor bung for an EGT gauge, supplied with a pre-installed plug
Compatible with the factory or aftermarket exhaust systems
Track tested durability
Limited Lifetime Warranty

PARTS INCLUDED

Competition Series 4" catless downpipe
All hardware required for complete installation
Pre-installed plugs for the optional O2 and EGT bungs when those options are ordered

TECH RESOURCES

Additional Parts Required

None. Evolution Racewerks specifies no additional hardware for this downpipe; all installation hardware is supplied.
A signed Vehicle Compliance Waiver and vehicle use verification are required before this part ships.
Optional companion part: Evolution Racewerks BMW B46/B48 Charge Pipe Kit.
Installer supplies normal hand tools, a vehicle lift or stands, and penetrating oil for the factory exhaust fasteners.

Installation

Evolution Racewerks does not publish a downloadable installation guide for this downpipe. It installs as a direct replacement for the factory downpipe using the supplied hardware.
Contact Speed Logic if you need installation support or a recommended installer.

Notes

CAUTION: This product is intended for OFF ROAD COMPETITION USE ONLY. Not legal for use on pollution controlled vehicles upon public roads/highways. THIS PRODUCT IS FOR SALE FOR ALL 49 STATES EXCLUDING CALIFORNIA. In addition to vehicle use verification, a Vehicle Compliance Waiver needs to be signed. THIS ITEM IS NOT FOR SALE, INSTALLATION, OR USE ON LICENSED VEHICLES IN THE STATE OF CALIFORNIA. The item is for sale for international customers without restriction.
U.S. spec cars use the B46 engine; EU / Asia spec cars use the B48 and require the B48 version of this downpipe. Evolution Racewerks also builds this part in two production versions split by build date (2016 to 08/2020 and 10/2020+). Confirm your engine code and build date with Speed Logic before ordering.

PART NUMBER

BM-EXH019 — Competition Series 4" catless downpipe, brushed finish
BM-EXH019-P — polished finish
BM-EXH019-BLK — high temperature black thermal coating
Evolution Racewerks lists this part on its own site as BM-EXH019S.

VEHICLE APPLICATIONS

Make	Model	Chassis	Engine	Years
BMW	230i / 230i xDrive	F22 / F23	B46 2.0L Turbo I4	2016–2021
BMW	330i / 330i xDrive	F30 / F31 / F34	B46 2.0L Turbo I4	2016–2019
BMW	330i / 330i xDrive	G20	B46 2.0L Turbo I4	2019+
BMW	430i / 430i xDrive	F32 / F33 / F36	B46 2.0L Turbo I4	2016–2020
BMW	430i / 430i xDrive	G22 / G23 / G26	B46 2.0L Turbo I4	2021+
BMW	530i / 530i xDrive	G30	B46 2.0L Turbo I4	2017+
BMW	X3 sDrive30i / xDrive30i	G01	B46 2.0L Turbo I4	2018+
BMW	X4 xDrive30i	G02	B46 2.0L Turbo I4	2018+
BMW	Z4 sDrive30i	G29	B46 2.0L Turbo I4	2019+