This is an IS38 GT style stainless steel turbine housing upgrade for Golf, Audi A3 and Audi S3. It is Garrett style, usually fits GTX30 GTX30R ball bearing CHRA with reversed blades.

OTS accept custom-made stainless steel turbine housing request by open mold, casting and precision machining according to a solid sample or 3D drawing.


Material: stainless steel 316
A/R: 1.06
Turbine wheel size: 56mm, usually fit 55mm exducer reversed turbine wheel
Mark: Garrett style, usually fit with GTX30 GTX30R ball bearing CHRA with reversed blades


  • Rust resistant, better durability and longevity vs iron turbine housing
  • Investment cast stainless steel for a beautiful, smooth interior and exterior
  • Better heat control than cast iron

Why OTS Stainless Steel Turbine Housing?

1. Reliable Raw Material
we use stainless steel 316, which contains alloy molybdenum, this drastically enhances corrosion resistance.

2. Rich Experience in Casting
We have rich experience in stainless steel turbine housing casting with a result of:
1) Smooth and beautiful outside surface
2) Smooth internal flow
We apply ceramic core investment casting for these turbine housings with thin wall and small flow, which makes the surface much smoother than sand core does.

3. Rich Experience in Precision Machining
Stainless steel turbine housing needs much higher precision machining requirements. The most difficult machining area is inlet port. We can well finish it with our experience.

IS38 GT style stainless steel turbine housing