![Integrated Engineering Catback Exhaust System | B9 S4 E85 · E86 Z4 25i 2.5L I6 [M54] There are no thin-sided finicky](https://cdn.shopify.com/s/files/1/0635/0032/1015/files/IntegratedEngineeringCatbackExhaustSystemB9S4.png?v=1693693070)
Pay in 4 interest-free payments of $168.88 Learn more
Ships within 48 hours · Estimated delivery Sep 1 - Sep 6
There are no thin-sided finicky exhaust clamps found here
Enjoy more power
8' by 2' impressive piece of merch
The logger logs much faster than commercially available diagnostic loggers
Stage 2 91: up to 26%HP / 28%TQ
Integrated Engineering Catback Exhaust System | B9 S4 E85 · E86 Z4 25i 2.5L I6 [M54] There are no thin-sided finickyThe IE Catback Exhaust System for your Audi B9 B9. 5 S4 incorporates our in house engineered DroneTrap technology to deliver a truly aggressive exhaust note without any annoying drone or rasp. Engineered with cutting edge design features, including mandrel bent stainless steel, TIG welding, multi point reinforcements, and oversized quad tips. Experience the elevated and enriched sound your S4 deserves. IE's advanced DroneTrap technology captures the
