Bull Boost Performance K-Series 1018 Steel Exhaust Header Flange

Bull Boost Performance K-Series 1018 Steel Exhaust Header Flange

Part Number: 729859401898

Build a stronger, more reliable turbo manifold or exhaust header with the Bull Boost Performance K-Series 1018 Steel Exhaust Header Flange. Precision CNC-machined from premium 1018 mild steel, this heavy-duty flange is designed for fabricators, racers, and performance enthusiasts who demand superior fitment, strength, and long-term durability.

Featuring a precision-machined 3D port design, this flange promotes smoother exhaust flow transitions while providing excellent weldability and fabrication flexibility. The robust 1/2-inch thick construction helps prevent warping under extreme heat and boost conditions, making it ideal for naturally aspirated, turbocharged, street, drag racing, and road racing applications.

Manufactured in the USA to professional fabrication standards, this flange is engineered to deliver consistent sealing, accurate fitment, and long service life.

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
• Ideal for turbo manifold fabrication
• Suitable for custom exhaust header construction
• Improved sealing surface for maximum reliability
• Made in the USA

Engineering & Construction:

CNC Machined 1018 Mild Steel

• Constructed from premium-grade 1018 steel for excellent strength, durability, and welding characteristics.

Precision 3D Port Design

• Machined port entries provide a smooth transition into runners, helping improve exhaust flow and fabrication quality.

Heavy-Duty 1/2" Thickness

• Designed to resist warping and maintain gasket sealing integrity under extreme temperatures and high-performance conditions.

Fabricator Friendly Design

• Suitable for TIG and MIG welding and ideal for custom turbo manifold and header fabrication projects.

Specifications:

• Material: 1018 Mild Steel
• Thickness: 0.500" (12.7mm)
• Overall Length: Approximately 12.25" (311mm)
• Port Opening Diameter: Approximately 1.75" (44.5mm)
• Overall Height: Approximately 3.00" (76mm)
• Configuration: 4-Port K-Series Design
• Finish: Raw Machined Steel
• Manufacturing Process: CNC Machined
• Country of Manufacture: USA

Applications:

• Turbo manifold fabrication
• Custom exhaust header fabrication
• Drag racing builds
• Road racing applications
• Time attack vehicles
• High-performance street builds
• Naturally aspirated and forced induction projects

Package Includes:

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

Fitment:

• Honda K20 Engines
• Honda K24 Engines
• Acura K20 Applications
• Acura K24 Applications
• 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 prior to 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.