PA725 IS38 Upgrade Ball Bearing Hybrid Turbocharger for Audi A3 S3 8V MQB EA888 Gen3

PA725 IS38 Upgrade Ball Bearing Hybrid Turbocharger
For Audi A3 / S3 8V, MQB platform, EA888 Gen3 2.0T engines.

This is a high-performance hybrid turbo upgrade based on the factory IS38. Compared to our previous PA585 (cast-iron exhaust housing, ~500 HP), the PA725 features a stainless steel exhaust housing with a significantly larger A/R ratio, supporting up to 650 HP while maintaining strong response and reliability.

Key Upgrades & Spec Comparison (vs. OEM IS38)

Compressor Housing

• Compressor wheel: Inducer 54 mm / Exducer 67 mm (OEM 45 mm / 58 mm)
• Wheel type: Billet (OEM Cast)
• Inlet: 60 mm (same as OEM)
• A/R: 0.6

Cartridge

• Bearing: Ball bearing (OEM Journal) — faster response and improved durability

Turbo Housing

• Turbine wheel: Exducer 55 mm / Inducer 60 mm (OEM 47 mm / 53 mm)
• A/R: 0.72 (significantly increased for better high-rpm exhaust flow)
• Exhaust housing material: Stainless steel (superior heat resistance compared to the cast-iron housing on the PA585)

Power Support

• OEM IS38 ≈ 300 HP → PA725 up to 650 HP (with proper supporting modifications and tuning)

Product Highlights

• Direct bolt-on replacement for the OEM IS38, compatible with factory oil and coolant lines.
• Stainless steel exhaust housing + larger A/R design reduces backpressure and delivers stronger top-end power.
• Ball-bearing core + larger billet compressor wheel provides excellent low-end response and high-power capability.
• Ideal upgrade for those seeking higher power and durability beyond the cast-iron PA585 (500 HP) version.

A strong performance upgrade for Audi / VW MQB EA888 Gen3 platforms looking to extract more power from the IS38 platform.

Engine codes that fit: CNTA, CXCA, CHHB, CXDA, CXCB, CNTC, CHHA, DLBA, CJXE, CJXB, CJXC