ER S58 Crossover Pipe BMW G8x M3 M4 - Step By Step Install

Mike @ XPH

Platinum Vendor
Nov 18, 2016
Las Vegas

Order Link

Note: Evolution Racewerks shipping protection is top-notch. Removing the bubble wrap and peanuts take more time than the actual install :)

Key Features:
Now available for the 2021+ BMW M3/M4 S58 Engines!
Higher Max Horsepower Power Curve
Higher Initial Torque Curve. The torque curve hits faster and higher and longer.
Better throttle response and faster turbo spool up times
Mandrel Bent 3" piping. Smooth transition to the exhaust system.
100% Stainless Steel Construction
100% TIG welded for better quality welds
Precision CNC machined turbocharger V-Band and flange
Mirror polish or brush finish
Available with high temperature black thermal coating to reduce underhood temperatures
Compatible with the factory or aftermarket exhaust systems
Track tested durability
Includes all hardware for complete installation
Limited Lifetime Warranty

Restrictions in the exhaust system rob horsepower and torque, especially on turbocharged cars. Thus, removing exhaust flow restrictions will significantly increase horsepower and torque. The G Chassis M3/M4 utilizes a Y-style mid-pipe. However, both downpipes are both on the right side of the engine. The left side downpipe connects to the "crossover" pipe as it crosses over to the left side underneath the transmission to connect to the midpipes. The right side downpipe connects directly to the mid-pipe. Since this crossover pipe goes under the transmission, BMW squished the round pipe into an oval to give clearance. However, going from a round tube to an oval causes turbulence inside the pipe, which causes a restriction. We found plenty of clearance to keep the tubing round, and thus we built our replacement Crossover Pipe without needing to squish the tubing. The factory crossover pipe utilizes cast components, so it is pretty heavy. Our replacement Crossover Pipe is lighter, and thus some weight savings can be had.

Our Competition Series Catless Downpipes is 100% 304-grade stainless steel and utilizes mandrel bent piping. Our in-house fabricators are 100% TIG welded and built in the USA. 100% bolt-on.

Our Crossover Pipe is designed to fit perfectly with either the factory or your aftermarket mid-pipes. There are no compatibility issues whatsoever. The Crossover Pipe will come by default with a brushed finish.

Ceramic Thermal Coating - The purpose of ceramic coating downpipes is to keep heat from the exhaust gases inside the downpipe from radiating out. This keeps underhood temperatures lower and absorbs less by nearby parts/surfaces. Another added benefit is that exhaust flow velocities stay up by keeping in heat (energy) in the exhaust gases inside the downpipe, resulting in lower backpressure. The ceramic coating also adds additional corrosion resistance. We utilize the best ceramic coating possible. Our thermal layer can resist up to 2000F of heat. It is available in black only (all the other colors cannot withstand the high heat levels).