APR CD100008 Downpipes and Cats for Audi B6 and B7 S4 6-speed

The APR CD100008 Downpipes and Cats replace the 4-cat factory setup with a pair of metal matrix catalysts. In testing, a full APR exhaust produces gains of 25hp and 35lb-ft across most of the engine powerband. Throttle response is also greatly improved. With TIG welding, fully stainless mandrel bent construction, and CNC'ed hangers, you will not find a higher quality system on the market. Note: APR CD100008 Downpipes and Cats are designed to fit with an APR catback system, other exhaust systems may require modification to fit. The APR CD100008 does not fit Tiptronic equipped vehicles.

  Related Products


  APR CB100017 2.25" Stainless Steel Cat-back Exhaust for Audi B6 S4 Sedan, Avant and Cabriolet  - The APR Audi B6 S4 V8 exhaust offers the best bang for the buck!

 Other Items from Exhaust upgrades for Audi B6 S4

  Neuspeed 30.02.41 70mm Cat-back Exhaust for Audi B6 S4  - 
  APR FE100012 2.25" Stainless Steel Full Exhaust for Audi B6 S4 Sedan, Avant and Cabriolet 6-spd - The APR Audi B6 S4 V8 full exhaust offers the most gains possible!
  APR CB100017 2.25" Stainless Steel Cat-back Exhaust for Audi B6 S4 Sedan, Avant and Cabriolet  - The APR Audi B6 S4 V8 exhaust offers the best bang for the buck!
  APR CD100008 Downpipes and Cats for Audi B6 and B7 S4 6-speed - Improve the exhaust flow on your V8 for more power!
  APR FE100032 2.25" Stainless Steel Full Exhaust for Audi B6 S4 Sedan, Avant and Cabriolet Tiptronic - The APR Audi B6 S4 V8 full exhaust offers the most gains possible!
  APR CD100016 Downpipes and Cats for Audi B6 and B7 S4 Tiptronic - Improve the exhaust flow on your V8 for more power!