Bull Boost Performance B-Series 1018 Steel Exhaust Header Flange

Bull Boost Performance B-Series 1018 Steel Exhaust Header Flange

Part Number: 729859401904

Build a stronger, more reliable exhaust manifold with the Bull Boost Performance B-Series 1018 Steel Exhaust Header Flange. Designed for fabricators, racers, and performance enthusiasts, this CNC-machined flange is manufactured from premium 1018 mild steel and engineered to withstand the extreme temperatures and stress associated with high-performance street and race applications.

Featuring a precision-machined 3D port design, this flange provides a smooth transition between the cylinder head and exhaust runners, helping optimize exhaust flow while simplifying fabrication. The heavy-duty 1/2-inch thick construction minimizes flange warping and maintains consistent gasket sealing under high heat and boost pressures.

Whether you're building a naturally aspirated race header or a high-horsepower turbo manifold, this flange delivers the durability and precision required for professional-level fabrication.

Features:

• Manufactured by Bull Boost Performance
• CNC machined in-house
• Premium 1018 steel construction
• Precision 3D port design
• Heavy-duty 1/2" thick flange
• Excellent TIG and MIG weldability
• High-temperature resistant design
• Improved gasket sealing surface
• Suitable for turbocharged and naturally aspirated applications
• Race-proven durability
• Made in the USA

Engineering & Construction:

CNC Machined 1018 Steel

• Manufactured from premium 1018 mild steel for excellent strength, weldability, and long-term durability.

Precision 3D Port Design

• Machined port entries provide improved runner transitions and professional fabrication quality.

Heavy-Duty 1/2" Thickness

• Designed to resist warping and maintain a reliable seal under extreme operating conditions.

Fabricator Friendly

• Ideal for custom turbo manifolds, race headers, and high-performance exhaust systems.

Specifications:

• Material: 1018 Mild Steel
• Thickness: 0.500" (12.7mm)
• Configuration: B-Series 4-Port Design
• Finish: Raw Machined Steel
• Manufacturing Process: CNC Machined
• Application: Exhaust Header / Turbo Manifold Fabrication
• Country of Manufacture: USA

Perfect For:

• Custom exhaust header fabrication
• Turbo manifold fabrication
• Drag racing applications
• Road racing builds
• Time attack vehicles
• Street performance projects
• High-horsepower forced induction setups

Package Includes:

• (1) Bull Boost Performance B-Series 1018 Steel Exhaust Header Flange

Fitment:

• Honda B16 Engines
• Honda B18 Engines
• Honda B20 Engines
• Compatible with custom exhaust header fabrication
• Compatible with turbo manifold fabrication
• Suitable for street, drag racing, road racing, and forced induction builds

Important Notes:

• Professional fabrication and welding are recommended
• Verify dimensions and intended application before purchase
• Hardware, tubing, and gaskets are not included unless otherwise stated

RPM Racing offers professional installation services and a wide selection of performance parts to help complete your build.

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