OVERVIEW

Evolution Racewerks Competition Series Catless Downpipes are built for the BMW S63B44Tü twin-turbo V8 and fit the 2011 and newer M5 (F10) and 2011 and newer M6 (F12 / F13). They are constructed from 100% 304 grade stainless steel with mandrel bent piping, TIG welded in house and built in the USA. The factory turbine housing uses a 3.5" V-band flange, which Evolution Racewerks duplicated and CNC machined from billet 304 stainless steel; the O2 sensor bungs are CNC machined stainless and the brackets are laser cut and TIG welded with stainless rod.

Exhaust restriction costs horsepower and torque on a turbocharged engine, and the factory catalytic converter is the largest restriction in the system. Its honeycomb catalyst forces exhaust gas through a fine weave and creates turbulence downstream that slows flow further. Replacing the factory catalyzed downpipes with the Competition Series catless units removes that restriction, improving throttle response and turbo spool.

The factory flex bellows section is retained rather than deleted. A flex section lets the exhaust move so stress is not fed back into the exhaust manifolds, turbochargers and exhaust components, which matters on lowered cars where the system can be pushed upward on contact. Evolution Racewerks flex sections are 100% stainless steel, not stainless braid with steel caps, for corrosion resistance. The factory heatshields are also retained, and new O2 sensor sleeves are supplied so the heatshield seals exactly as it did from BMW, keeping underhood temperatures down.

SPECS

Mandrel bent 3" piping for a smooth transition into the exhaust system
100% 304 grade stainless steel construction
100% TIG welded, built in the USA by in-house fabricators
3.5" turbocharger V-band flange, CNC machined from billet 304 stainless steel to match the factory turbine housing
CNC machined stainless steel O2 sensor bungs and laser cut brackets
100% stainless steel flex section for proper exhaust movement
Retains the factory heatshields, with new O2 sensor sleeves supplied to seal them
Finish: brushed as standard, polished optional
Optional black ceramic thermal coating rated to 2000°F, available in black only, for lower underhood temperatures, higher exhaust gas velocity and added corrosion resistance
Optional additional O2 sensor bung for a wideband sensor, supplied with a pre-installed plug (email to add)
Optional 1/8" NPT EGT bung for an EGT gauge, supplied with a pre-installed plug (email to add)
Compatible with the factory or aftermarket exhaust systems
Track tested durability
Limited Lifetime Warranty

PARTS INCLUDED

Competition Series catless downpipes
New O2 sensor sleeves for sealing the factory heatshields
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 these downpipes; all installation hardware is supplied and the factory heatshields are reused.
Optional O2 and EGT sensor bungs must be requested by email before the order is built.
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 these downpipes. They install in place of the factory catalyzed downpipes 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 USE ONLY. Not legal for use on pollution controlled vehicles upon public highways. THIS PRODUCT IS FOR SALE FOR ALL 49 STATES EXCLUDING CALIFORNIA. THIS ITEM IS NOT FOR SALE, INSTALLATION, OR USE ON LICENSED VEHICLES IN THE STATE OF CALIFORNIA. This does not affect any international customers.

PART NUMBER

BM-EXH014 — Competition Series catless downpipes, brushed finish
BM-EXH014-P — polished finish
BM-EXH014-BLK — black ceramic thermal coating

VEHICLE APPLICATIONS

Make	Model	Chassis	Engine	Years
BMW	M5	F10	S63B44Tü 4.4L Twin-Turbo V8	2012–2016
BMW	M6	F12 / F13	S63B44Tü 4.4L Twin-Turbo V8	2012–2016