![Integrated Engineering Catback Exhaust System | B9 S4 E85 · E86 Z4 25i 2.5L I6 [M54] The logger logs much faster](https://cdn.shopify.com/s/files/1/0635/0032/1015/files/IntegratedEngineeringCatbackExhaustSystemB9S4.png?v=1693693070)
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The logger logs much faster than commercially available diagnostic loggers
Enjoy more power
1x Front Set of iSWEEP IS1500
During this balancing process you can potentially drop the wheel and damage it
Integrated Engineering Catback Exhaust System | B9 S4 E85 · E86 Z4 25i 2.5L I6 [M54] The logger logs much fasterThe 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
