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Evolution Racewerks 2018-UP BMW F90 M5 | F91/F92/F93 M8 (incl. Competition) Hi-Flow CATTED PRIMARY Downpipe (BM-EXH022CAT-PRIM)



Price with options x Qty: $1,435.50

Available Options

2018-UP BMW F90 M5 | F91/F92/F93 M8 (incl. Competition)

Sport Series Hi-Flow CATTED PRIMARY Downpipe (Upper ONLY)


This is for CATTED version, if you're looking for CATLESS version, please click here

Introducing our new Sport Series Hi-Flow Catted Downpipes for your twin turbo S63M engine!  Fits 2018+ F90 M5 | 2020+ F91/F92/F93 M8.


- BMW 2018-up F90 M5, includes Competition Package

- BMW 2020-up F91/F92/F93 M8, includes Competition Package

CAUTION: This product is intended for OFF ROAD COMPETITION USE ONLY. Not legal for use on pollution controlled vehicles upon public road/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.


The item is for sale for international customers without restriction.

Ease of Installation: (1 Easy, 5 Hard) 3

Installation Guide

Parts Checklist

Key Features:

  • Now available for the 2018+ BMW F90 M5 | 2020+ BMW F91/F92/F93 M8 S63M Engines!
  • Higher Max Horsepower Power Curve
  • Higher Intial 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.
  • Mirror polish or brush finish
  • Available with 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.




Full Kit Brushed Finish Shown

Restrictions in the exhaust system robs horsepower and torque especially on turbocharged cars.  Thus, removing as much 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 Competition Series Catless Downpipe, more power is unleashed!  You will feel the difference instantly. 

The 2018+ BMW M5 (F90) and 2020+ BMW M8 (F91/F92/F93) has 2 primary catalytic converters and 2 secondary catalytic converters for a total of 4 catalytic converters.  Our Competition Series Hi-Flow Catted Downpipes replace both the primary and secondary sections.




Primary Section Shown in Brushed Finish




Secondary Section Shown in Brushed Finish

Our Competition Series Hi-Flow Catted Downpipes is 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 whatsover.  The downpipes will come by default with 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 less heat absortion 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 backpressure.  The ceramic coating also adds additonal 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).


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