The S400/GT42 Downpipe Clamp and Flange 4" (T4 Models) is a high-quality, durable clamp and flange set designed for T4 model turbochargers. This set ensures a secure and leak-free connection between the downpipe and the turbocharger, featuring a 4-inch diameter for optimal exhaust flow and performance. Ideal for high-performance applications, it is constructed from robust materials to withstand extreme temperatures and pressures, providing reliable and long-lasting service.