Spoon Sports 4-2-1 Exhaust Manifold Header

The ultimate Spoon exhaust manifold, the 4-2-1 manifold, has been meticulously engineered to optimise torque and power for high-capacity, naturally aspirated Honda engines with elevated RPM capabilities. Rigorous flow and performance testing have been conducted on the headers, with torque and outright horsepower being perfectly balanced to provide the most substantial performance gains achievable. 

Slightly unequal length runners were found to provide the best performance gains of all configurations tested. This design allows for optimal exhaust scavenging meaning air flow into the combustion chamber is vastly improved.

• Improved exhaust flow
• Enables the unique VTEC sound to be heard
• Significant weight savings
• Recommended to be combined with ECU tune for significant increase in power and performance

• Stainless steel construction
• High quality tig welding for all joins
• 50% weight reduction with a 5.2kg total weight (OEM 10.2kg)

• Spoon Sports 4-2-1 Exhaust Manifold
• Gasket and hardware kit