K&N Universal X-Stream Clamp-On Filter 6in Base OD x 5in Top OD x 6.5in Height x 3in Flange ID - RX-4730 fits_2002-2008`Audi`A4 These are also length adjustable

These are also length adjustable if you want to adjust out any static pre-load in the rear bar

Material: Ultra-light Grade 5 titanium throughout

Vacuum tubing is supplied to connect the vacuum box to the mufflers

----This Mishimoto performance radiator for the 2014-2017 SS is a beast

K&N Universal X-Stream Clamp-On Filter 6in Base OD x 5in Top OD x 6.5in Height x 3in Flange ID - RX-4730 fits_2002-2008`Audi`A4 These are also length adjustableK&N XStream Top Universal Air Filters take performance to the next level with the addition of a filter within the filter's top adding more filter area for higher air flow and a longer service interval. The XStream Air Filter provides awesome air flow and outstanding filtration. When racing, in any environment, racers need all the protection and airflow they can get. K&N delivers. All K&N universal air filters are constructed with ultra strong molded