Evolution Racewerks - High Flow Catted Downpipe || S58 (G80/G82)

Key Features:

• Now available for the 2021+ BMW M3/M4 S55 Engines!
• High Flow 200 cell metallic catalytic converter 
• Higher Max Horsepower Power Curve
• Higher Initial Torque Curve.  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 flange.
• Retains factory donut-style gasket
• Mirror polish or brush finish
• Available with a high-temperature black thermal coating to reduce underhood temperatures.
• Retains factory slip-on style connection.
• Compatible with the factory or aftermarket exhaust systems.
• Track-tested durability.
• Includes all hardware for complete installation.
• Limited Lifetime Warranty.

We use a 200-cell metallic core for our Sports Series High-Flow Catted Downpipes. By having fewer cells per square inch, these individual "cells" are bigger in size thus allowing exhaust gas to pass through them more easily. Thus, the lower the cell count, the higher the flow. Higher flow = more power, faster turbo spool up (less turbocharger lag), and better throttle response. The bottom line is faster. The benefits of a metallic catalytic converter vs. a ceramic-like the factory are that it can take higher temperatures and is more durable (last longer). They are also lighter than their ceramic counterparts. Restrictions in the exhaust system robs horsepower and torque, especially on turbocharged cars.  Thus, removing as many exhaust flow restrictions will increase horsepower and torque significantly.  The factory catalytic converter found in the factory downpipe is a big culprit of this and is a major exhaust flow restriction. The factory catalytic converter is made up of catalyst material formed into "honeycomb" weaves. Exhaust gas must pass through these tiny "honeycomb" weaves on their way to the exhaust system thus causing a major exhaust flow restriction. It also causes turbulence after the catalytic converter which causes the exhaust flow to slow down (which increases restriction). By replacing the factory downpipe/catalytic converter with our Sports Series High Flow Metallic Catted Downpipe, more power is unleashed! 

Our Sport Series High Flow Catted Downpipes are constructed out of 100% 304-grade stainless steel and utilize mandrel bent piping. They are 100% TIG welded by our in-house fabricators and built in the USA.  The factory turbocharger turbine housing utilizes a 3.5" V-Band flange which we have duplicated and CNC machined cut out of billet 304 stainless steel.  Stainless Steel CNC machined O2 sensor and laser cut brackets are TIG welded using stainless steel rods.  The O2 sensor is positioned at the factory location.  The factory donut flange design is retained.  100% bolt on. 

Our downpipes are designed to fit perfectly with either the factory exhaust system or your aftermarket exhaust system.  There are no compatibility issues whatsoever.  The downpipes will come by default with a brushed finish.

OPTIONS

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 less heat absorption by nearby parts/surfaces.  Another added benefit is that by keeping in heat (energy) in the exhaust gases inside the downpipe, exhaust flow velocities stay up, resulting in lower back pressure.  The ceramic coating also adds additional corrosion resistance.  We utilize the best ceramic coating possible.  Our thermal coating can resist up to 2000F of heat.  It is available in black only (all the other colors cannot withstand heat that high).