Untd. Performance IS38 Cast Turbo Inlet – Audi A3 S3 8V – VW GTi Golf R

$103.00

Built for quicker spool, stronger airflow, and real-world gains you can feel, the Untd. Performance IS38 Cast Turbo Inlet is a must-have upgrade for MK7/MK7.5 Golf R and Audi A3 / S3 8V owners running the factory IS38 turbo. The stock inlet is a common restriction—especially once you add a tune, intake, or downpipe. This cast inlet fixes that bottleneck by improving the turbo’s ability to breathe, helping your setup build boost more efficiently and pull harder through the powerband.

Key Features

Increased Airflow, Reduced Restriction

The factory turbo inlet can choke airflow right where the turbo needs it most. The Untd. Performance inlet is designed to smooth and open up that pathway—helping the IS38 ingest air easier for better efficiency and stronger top-end pull.

Faster Spool & Better Throttle Response

More efficient airflow into the compressor means the turbo doesn’t have to work as hard to hit target boost. The result is quicker spool, improved transient response, and a sharper feel when you roll into the throttle—especially in the midrange.

Cast Construction for Strength & Consistency

Unlike thin or flexible materials that can deform under heat and load, the cast design offers excellent durability and maintains its shape under high temperatures—perfect for tuned cars that see higher boost and sustained use.

Ideal for Tuned & Bolt-On Setups

This inlet is a perfect match for Stage 1 / Stage 2 builds, ethanol blends, and full bolt-on configurations. It’s one of those supporting mods that helps your turbo and tune perform more consistently by improving airflow at the source.

Combine It With a Tune (Recommended)

A turbo inlet upgrade really comes alive when paired with a quality tune. With less restriction ahead of the compressor, your IS38 can reach targets more efficiently—often improving boost response and helping maintain airflow as RPM climbs. If you’re already tuned (or planning to), this is an ideal “supporting” mod that makes the whole setup feel more responsive and eager.