Integrated Engineering ProCore Downpipe | B9 S4 · S5 E36/7 · E36/8 Z3 19i 1.9L I4 [M44] or combine with IE 188mm

or combine with IE 188mm crank pulley (IEBAVJ7) (Stage 2 dual pulley) for up to a massive 548HP

eliminate any metal on paint contact

The coating also allows the use of a touchscreen device without having to remove them

High temperature

HPFP upgrade for ethanol & larger turbo tunes

Integrated Engineering ProCore Downpipe | B9 S4 · S5 E36/7 · E36/8 Z3 19i 1.9L I4 [M44] or combine with IE 188mmThe IE ProCore Downpipe for your Audi B9 S4 or S5 delivers an improved exhaust note and increased flow. Our in house engineered 6" 400CPSI catalytic converter channels substantial flow to support upgraded engine tunes and larger turbochargers. The specialty tri core design and precious metal coatings align with ECU emissions requirements so that you can upgrade without the check engine light. IE's in house engineered ProCore Catalyst features our own