Ferrea Honda B17A1/B18C1/C3 29mm 5.45mm 102.5mm 25 Deg Flo +1mm Super Alloy Exhaust Valve - Set of 8

If you're rebuilding the top end of your Honda B17A1, B18C1, or B18C3 engine, these Ferrea exhaust valves are a solid choice. This set includes eight valves, each measuring 29mm in diameter with a 5.45mm stem and a total length of 102.5mm. They feature a 25-degree Flo head design and are +1mm oversized, intended to replace your stock exhaust valves during an engine overhaul.

Ferrea uses a super alloy material for these valves, which is known for its strength and ability to withstand the high temperatures found in exhaust ports. The 25-degree Flo head is an updated design that helps improve airflow compared to a standard 45-degree seat, potentially leading to better cylinder filling and exhaust scavenging. The +1mm oversizing means these valves are slightly larger than stock, which can be beneficial for sealing in engines that have had their valve seats re-machined or for maximizing compression in performance builds.

When installing these valves, ensure your valve guides and seats are in good condition and properly prepped for the oversized valves. This set is designed as a direct replacement for the exhaust valves in the specified Honda engines, making them a straightforward component for your engine rebuild project.