GSC Power Division 2033-8 Chrome Exhaust Valve 29 mm +1 mm Head for Honda B

Vehicle Fitment

• Engines: Honda B-Series DOHC VTEC - B16A, B17A, B18C (all B-series 4-cyl heads requiring 6 mm stem / 29 mm exhaust valve +1 mm oversize)

Features

• Exhaust valve for high-performance or rebuilt B-series heads, with +1 mm oversize head for increased exhaust flow and improved head breathing
• Chrome-polished stem and head - smoother surface for reduced carbon buildup and improved longevity under high-RPM / high-boost conditions 
• Back-cut valve head to reduce overall weight - helps with valve train stability at high RPMs and permit aggressive cam profiles without excessive spring seat pressure 
• Swirl-polished head design - optimized for better exhaust flow dynamics and improved flow area under load/boost 
• Compatible with OEM or upgraded valve guides / keepers - though for performance builds upgraded components are recommended for reliability and longevity 
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• Sold as a set - full set of 8 exhaust valves, enough for a 4-cylinder head (all cylinders) - convenient for full rebuilds or head overhauls
• Suitable for high-RPM, high-boost or high-power builds - improved strength and flow compared to stock exhaust valves
• Designed, machined, and polished under GSC Power Division's valvetrain standards - ensures tight tolerances, heat resistance, and reliability under stress 

Specifications

• Part Number: 2033-8
• Valve Type: Exhaust Valve, +1 mm oversize head
• Head Diameter: 29.00 mm ( +1 mm over stock B-series exhaust valve) 
• Quantity: Set of 8 (for 4-cylinder head - all exhaust ports)
• Stem Finish: Chrome-polished stainless/steel alloy (heat-resistant, smooth surface) 
• Head Finish: Chrome-polished, swirl-polished exhaust face for improved flow and sealing performance 
• Application: Honda B-Series DOHC VTEC engines (B16A, B17A, B18C) requiring +1 mm exhaust valves for improved flow
• Included: 8x Exhaust Valves (set for one head) - no springs, retainers, keepers, or seals included. Valve-train supporting components must be selected separately.

Included Components

• 1x Set of 8 Chrome-polished Exhaust Valves, 29 mm +1 mm head - part 2033-8

Product Description

The GSC Power Division 2033-8 Chrome Exhaust Valve set is a direct-upgrade exhaust valve package designed for Honda B-Series DOHC VTEC engines (B16A / B17A / B18C). These valves feature a +1 mm oversize head (29 mm) compared to stock, which improves exhaust flow and breathing - especially beneficial when you run aggressive cam profiles, high RPM, or increased boost. The chrome-polished stem and head with swirl-polished exhaust face minimize carbon buildup and improve airflow dynamics, resulting in more consistent performance under stress.

With back-cut, lightweight design and high-finish surfaces, these valves offer improved valvetrain stability at higher RPMs. Selling as a complete set of 8, the 2033-8 is ideal for a full head rebuild or performance upgrade. Note that this product only includes valves - you'll need matching valve springs, retainers, keepers, seals, and guides as required for a proper valvetrain build.