Fully polished 2.5" system with dual 3" rolled edge polished tips
2004-2005 models

Billy Boats's A4 Exhaust is a complete stainless steel mandrel bent cat-back exhaust. On an A4 the catalytic converter is bolted to the turbocharger and then the exhaust begins with the downpipe. Unlike most other aftermarket exhausts the BB exhaust includes a 2.5" downpipe. The exhaust then continues back to the innovative center muffler where it splits into dual 2.25" pipes. Each of these mandrel bent pipes goes to its own muffler with a 3.5" rolled round tip. The BB Sport exhaust is for the no-compromise enthusiast that wants maximum gains and doesn't mind a little extra exhaust note. This system is similar in construction to the Stealth exhaust but deletes the center muffler. With TIG welding fully stainless construction and CNC'd hangers you will not find a higher quality system on the market.

Application Guide:
2003-2004 Audi A4 1.8T - 5 speed transmission ONLY!