Supertech Nissan SR20D Inconel Exhaust Valve - +1mm Oversize - Set of 8

If you're rebuilding the top end of a Nissan SR20D engine, these Supertech Inconel exhaust valves are a solid option. This set includes eight valves, each measuring 1mm oversize to help restore compression and performance in engines with worn valve seats or guides. Inconel is a high-nickel alloy known for its exceptional strength and resistance to extreme heat, making it ideal for exhaust valve applications where temperatures can soar.

These valves are built to handle the demanding conditions of the exhaust side. The Inconel material helps prevent valve distortion and burning, which can be common issues in high-performance or high-mileage SR20D engines. The +1mm oversize design means they are slightly larger in diameter than stock, allowing for a fresh sealing surface on the valve seat and potentially improving cylinder sealing. This is a common practice when rebuilding engines to ensure optimal performance and longevity.

When installing these valves, remember they are designed as a direct replacement for the stock exhaust valves, but the oversize nature may require specific machine work on the cylinder head's valve seats to ensure a proper fit and seal. Always consult your engine's service manual or a qualified machinist for the correct procedures.