BULL BOOST PERFORMANCE RB20 RB25 RB26 DET T4 Top Mount Twin Scroll Turbo Manifold for Nissan Skyline GTR R32 R33 R34 – Dual 44mm Wastegate

Part Number: 720595370226

The Bull Boost Performance RB-Series T4 Top Mount Twin Scroll Turbo Manifold is engineered for serious high-performance Nissan RB turbo builds requiring fast spool characteristics, strong midrange power, and exceptional exhaust flow efficiency. Designed specifically for RB20DET, RB25DET, and RB26DETT applications, this manifold is ideal for street, drift, drag, and track-focused builds targeting reliable high-horsepower performance.

Featuring a true twin-scroll divided pulse design, this manifold improves exhaust pulse separation to maximize turbocharger efficiency and reduce turbulence entering the turbine housing. The result is significantly improved turbo spool response, increased low-end torque, and stronger power delivery throughout the RPM range.

The true merge collector design promotes smooth, high-velocity exhaust flow while runner geometry has been optimized to compensate for the RB platform’s tendency to run leaner near cylinder #6. This helps improve overall flow balance and turbocharger performance under high-boost conditions.

Constructed using high-quality materials and precision fabrication techniques, the manifold features CNC-ported head flanges and machined sealing surfaces to ensure reliable sealing and long-term durability in demanding motorsport environments.

Key Features & Specifications:

• T4 twin-scroll turbo flange configuration
• Dual 44mm external wastegate flanges
• True twin-scroll divided pulse manifold design
• True merge collector for optimized exhaust flow
• Designed for rapid turbo spool and improved midrange power
• CNC-ported head flange for improved airflow efficiency
• Precision-machined sealing surfaces for leak-free installation
• Heavy-duty high-performance turbo manifold construction
• Designed specifically for RB-series turbocharged engines

Performance Benefits:

• Faster turbocharger spool response
• Increased low-end and midrange torque
• Improved exhaust pulse efficiency
• Reduced exhaust turbulence into turbine housing
• Better boost control using dual 44mm wastegates
• Supports high-horsepower turbocharger setups

Vehicle Fitment:

• Nissan Skyline R32 RB20DET / RB26DETT (1989–1994)
• Nissan Skyline R33 RB25DET / RB26DETT (1993–1998)
• Nissan Skyline R34 RB25DET / RB26DETT (1998–2002)
• Nissan RB20DET / RB25DET / RB26DETT engine swap applications

Installation Note:
Professional installation is strongly recommended. Additional turbo system components, fabrication, and custom tuning may be required depending on your setup.

Warranty Notice:
All warranties, claims, and product-related issues must be handled directly through BULL BOOST PERFORMANCE.