BorgWarner S300 T-4 Divided 1.00 A/R Turbine Housing

Features:

• 1.00 A/R Ratio – Balanced for quick spool and solid top-end horsepower

• T4 Divided (Twin Flow) Inlet Flange – Improves response and flow in twin-scroll setups

• 80/74mm Turbine Compatibility – Precision-fit for S300SX turbos with matching wheels

• Cast Iron Durability – Built to handle high EGTs and sustained high-boost applications

• Ideal for Street, Strip, or Pulling Builds – Excellent choice for diesel and gas setups pushing serious power

Boost your build with the BorgWarner S300SX 1.00 A/R Twin Flow Turbine Housing a high-efficiency upgrade for serious power and fast spool characteristics. Perfect for high-performance diesel or gas applications, this housing is designed for use with 80/74mm turbine wheels and features a divided T4 inlet flange to optimize exhaust pulse energy. With its 1.00 A/R ratio, this housing offers a well-balanced powerband that delivers quick response and strong mid-to-top-end power. The twin-scroll (divided) design enhances exhaust scavenging and turbo efficiency, making it ideal for competitive or aggressive street builds that demand consistent performance under pressure.

Fitment:
Universal Fitment - Designed for BorgWarner S300SX turbos with 80/74mm turbine wheels and a T4 twin-scroll inlet.

Notes:

• Fabrication may be required depending on manifold and downpipe setup

• Not a direct bolt-on for all vehicles – verify turbo compatibility before ordering

• Designed for experienced builders and custom applications

• Covered under BorgWarner’s limited warranty for defects in materials and craftsmanship.
• Warranty does not cover misuse, incorrect installation, or improper tuning.