AEM 6/05-08 Audi A4 2.0L-L4 Silver Cold Air Intake (NLA)The AEM 21 681C Performance Cold Air Intake System produces horsepower and torque gains by replacing your vehicle's restrictive factory air filter and air intake housing. This air intake system was designed, tuned and dyno tested to fit specific Audi A4 models. Air enters the system through an oversized AEM Dryflow synthetic washable air filter for outstanding air flow, filtration and performance. The air filter is located in the original air box

GKN Part #  304751

All Febi wheel bearings are maintenance free and have been designed for the entire life of the vehicle

Years of exposure to extreme temperature change degrades the gaskets and causes failure

OE Part # 948106059 / 948-106-059 / 948 106 059

Contact us to purchase upgrade credits

Got a squeaky or worn out tensioner bearing

strong enough to keep it stable in any condition and help to make fabricating or finding your mount location as easy as possible

Recommended to change every 40k miles change your spark plugs to maintain maximum power and efficiency for your engine

We also have the pulleys anodized in black so they more closely resemble the stock pulley and blend in better

with the optionally available KW DDC W-LAN module

4M1-423-055-AL / 4M1423055 AL / 4M1 423 055 AL / 4M1423055AL

5QM 413 023 AJ