Supertech Honda D16Z6/D16Y/D15B/D17A Inconel Exhaust Valve - +1mm Oversize - Set of 8

If you're rebuilding the top end of your Honda D16Z6, D16Y, D15B, or D17A engine and pushing its limits, these Supertech Inconel exhaust valves are a solid choice. They're designed to handle the extra heat and stress that come with higher performance applications, helping to keep your engine running strong under demanding conditions. The +1mm oversize means they're a bit larger than stock, which can help improve flow and sealing when paired with matching valve seats.

These valves are made from Inconel, a high-nickel, high-chromium alloy known for its exceptional strength and resistance to extreme temperatures and corrosion. This material is often used in high-performance racing applications because it holds up better than standard stainless steel when exhaust gas temperatures get really high. The +1mm oversize is a common upgrade for tuners looking to maximize airflow through the cylinder head. You'll want to make sure your valve guides and seats are properly prepped to accept the slightly larger valve diameter.