Looking for in-stock aftermarket parts to modify or upgrade your Audi A4 Quattro with in-line modules? At Tunersports.com we carry a huge selection of the top name brand performance in-line module parts and accessories for your A4 Quattro.
Whether you have a 2009 or 2023 Audi A4 Quattro in Avant to Ultra sport trim we have you covered. We have 2 in-line modules available to mod your A4 Quattro. All parts have free shipping to the Continental US 48 States.