2016-UP BMW B46 Engine Turbo Sport Series 4" Hi-Flow CATTED Downpipe

BM-EXH019CAT

Fitment:

- BMW 2016+ F2x 230i, 230iX
- BMW 2015+ F3x 330i, 330iX
- BMW 2016+ F3x 430i, 430iX
- BMW 2017+ G30 530i, 530iX
- BMW 2018+ G01 X3 sDrive30i / xDrive30i
- BMW 2018+ G02 X4 sDrive30i / xDrive30i

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

Introducing our new Sports Series 4" High Flow Metallic Catted Downpipes for your BMW B46 four cylinder turbo engine!  Fits all 2016+ 230i / 330i / 430i / 530i!  The B46 engine is found in all U.S. spec cars.  The downpipe is different than the B48 found in the EU / Asia spec cars.  You must get the correct downpipe for your car as they are not interchangeable. 

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.

THIS ITEM IS NOT FOR SALE, INSTALLATION, OR USE ON LICENSED VEHILES IN THE STATE OF CALIFORNIA. 

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 2016+ BMW 230i / 330i/ 430i / 530i B46 Engine!
• High Flow 200 cell metallic catalytic converter used
• Horsepower gains of 9 to 11 whp average (gains will vary based on modifications of your vehicle).
• Higher Max Horsepower Power Curve
• Torque gains of 15 wtq average (stock boost) up to over 20 wtq (Software upgrade) (gains will vary based on modifications of your vehicle).
• Higher Intial Torque Curve.  Torque curve hits faster and higher and longer.
• Better throttle response and faster turbo spool up times.
• Mandrel Bent 4" 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.
• Precision CNC machined ball joint flange with straight flow interior (versus factory press formed ball joint)
• Stainless steel flex section like factory that allows proper exhaust movement and flexibility.
• Mirror polish or brush finish
• Available with high temperature black thermal coating to reduce underhood temperatures.
• Optional - Additional O2 sensor bung for wideband O2 sensors (comes with pre-installed plug)
• Optional EGT sensor bung for EGT gauges (comes with pre-installed plug)
• Retains the factory "ball" type v-band connector.
• Improved design of "ball" connector for better flow characteristics over factory connector.
• Compatible with the factory or aftermarket exhaust systems.
• Track tested durability.
• Includes all hardware for complete installation.
• Limited Lifetime Warranty.
• Made in the USA!

Shown in Brush Finish

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 Sports Series 4" High Flow Metallic Catted Downpipe, more power is unleashed! 

The factory catalyter uses a 900 cell ceramic core. What the 900 cells means is that per every inch, there are 900 "cells" that the exhaust gas must pass through. We use a 200 cell metallic core. By having less cells per square inch, these individual "cells" are bigger in size thus allowing exhaust gas to pass through it 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. Bottom line, faster. The benefits of a metallic catalytic converter vs a ceramic like the factory is that it can take higher temperatures and is more durable (last longer). They are also lighter than their ceramic counterparts.

200 Cell Metallic Catalytic Converter Element

Our Sports Series 4" High 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 tur