Street Torque. Quick Response.
Introducing the PHR ST-1 Turbo Manifold, engineered specifically for the 2JZ-GE NA-T conversion. The ST-1 brings OEM-level reliability and fitment with performance-driven flow dynamics, giving your naturally aspirated 2JZ the boost-ready foundation it deserves.
Shown is a Precison Sportman Cover Turbo. We woudn't necessarily recommend you run a turbo of this size, but this shows what is capable of fitting. →
⚡ Quick Look: Key Features
- Cast from high-nickel stainless steel for maximum durability
- T4 twin-scroll flange for efficient pulse separation
- Integrated V-band wastegate port for precise boost control
- Designed for fast spool and low-RPM torque
- Compact layout for easy installation in IS300, GS300, SC300, and Supra NA-T builds
- Ideal for 400–900 HP setups, depending on turbo selection
- Crack-resistant and thermally stable under repeated stress
Features and Solutions
Focusing on what's important
Engineered for Strength
The ST-1 is precision-cast from high-nickel stainless steel, delivering superior resistance to heat and cracking compared to traditional tubular manifolds. This design eliminates weld stress points, ensuring long-term durability through countless heat cycles — perfect for street-driven or high-mileage turbo conversions.
Optimized Flow & Response
The internal flow paths are carefully sculpted for balanced exhaust distributionand efficient energy delivery to the turbine. The result — faster spool, improved torque response, and strong mid-range power that makes the car feel alive in real-world driving conditions.
Twin-Scroll Performance
Equipped with a T4 twin-scroll turbo flange, the ST-1 maximizes exhaust pulse energy and turbine efficiency. Paired with a twin-scroll turbo, it delivers exceptional throttle response and boost control without sacrificing top-end power.
Built-In, Prioritized Wastegate Port
An integrated V-band wastegate flange provides smooth flow for precise boost management. The design ensures stable control and consistent performance across varying loads and conditions.
Compact, Purpose-Built Design
Designed with street applications in mind, the ST-1 offers tight-bay clearancefor easy fitment with factory accessories and maintenance accessibility. It’s a true bolt-on solution for 2JZ-GE turbo conversions — clean, efficient, and built to last.
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