The K&N 57S-9501 is a 57i Series Generation II cold air intake from K&N Engineering, built to replace the entire factory intake assembly on Audi, SEAT, Škoda, and Volkswagen models with 1.4L to 2.0L engines from 2005 onward. Its non-metallic, rotationally molded tube is meant to keep incoming air cooler, and the kit uses a red, washable cotton gauze filter (RU-5061) in place of the paper element. Compared with stock, the kit moves the filter into a free-breathing path and drops the reusable element into a system the manufacturer says is designed to last the life of the vehicle. The manufacturer says it is guaranteed to add horsepower and improve torque, though it does not publish a dyno figure, so expect a performance gain rather than a specific number. The kit also carries K&N's Million Mile Limited Warranty and TÜV approval for Europe on applicable vehicles, which matters for buyers who need documented compliance.
Search for the K&N 57S-9501 intake for VW 2.0T TSI, Golf MK6 cold air intake, Audi A3 8P intake kit, or TÜV approved cold air intake to confirm your application. Fitment lists vary between sellers and TÜV status depends on the specific vehicle, so check K&N's application lookup with your exact model, engine code, and year before ordering. For DIY, the manufacturer rates installation at about 90 minutes or less and provides separate instruction sheets for VW and Audi/SEAT/Škoda/VW applications. Because the kit replaces the whole factory intake assembly, plan to remove the stock airbox and ducting, then follow the sheet's routing and clamp steps before sealing the aluminum tube and flexible hose.
The manufacturer lists TÜV approval for Europe, but approval is listed per vehicle application. Check K&N's vehicle application lookup with your exact model and engine before buying.
The manufacturer describes the filter as washable and reusable and says the intake can last up to 100,000 miles before service is required, depending on driving conditions.
The manufacturer states the kit is usually installed in 90 minutes or less and publishes installation instruction sheets for both VW and Audi/SEAT/Škoda/VW applications.
The manufacturer rates installation at about 90 minutes or less, and owners on user forums generally treat it as a driveway-level job. Because the kit replaces the entire factory intake assembly, start by removing the stock airbox and intake ducting. Use the instruction sheet that matches your platform, since the VW and Audi/SEAT/Škoda sheets are separate, and confirm the tube ports and hose routing match your engine before tightening clamps. Re-check that all clamps and the coupler are sealed so unmetered air cannot leak past the filter.
