---Manufactured from high quality T304 grade stainless steel ---3" Reducing to 2.5" to fit the vehicles original and most aftermarket exhausts ---Free flowing catalyst replacement to get the most from the 1.8T 20V engine ---Designed to improve power and torque across the entire RPM range ---Sold for off road and track use only Fitment: ---Audi A4 B6 1.8T 20v 2000-2009 incl. Avant models ---Volkswagen Passat B5.5 1.8T 20V 2000-2005 models.
