Supertech Inconel Exhaust Valve Set

This makes these valves perfectly suited for high-performance engines, especially those utilizing large frame turbochargers in both street and race environments, where high exhaust gas temperatures are common. Key features include a stock size head diameter of 30.15mm and a length of 102.2mm, with a stem diameter of 5.96mm. The valves are constructed as a one-piece forged, non-magnetic unit with a magnetic friction-welded wafer hardened to 52 HRC minimum. They also feature a "Superfinish" valve stem, offering a surface roughness approximately one-third that of a regular valve, and a single groove design. These Inconel valves offer significant benefits, including reduced valve head temperatures, which improves material strength and durability. This allows tuners greater flexibility and a wider range of spark timing advances. The valves also provide an average weight reduction of 10% compared to standard valves. Applications listed include the 2004 Volkswagen Golf Mk4 R32 and 2006–present Volkswagen Golf Mk5 R32 models. This set includes six exhaust valves. Note that due to the nature of performance applications, these parts are sold without any express or implied warranty of merchantability or fitness for a particular purpose.