This nut is needed for the Garrett GTX / G-series / TiAL V-Band clamps BOOST products nut for V-Band clamp Garrett GTX / G-series / TiAL Self-locking nut made of stainless steel, high strength and corrosion resistance Nut for Garrett GTX / G-series turbo VBand clamp, such as for VBand downpipe or V-Band manifold Note: Note: Not suitable for BorgWarner / AirWerks clamps! They have different thread. BOOST products Stainless steel nut, self locking. Fits Garrett GTX / G series / TiAL V-Band clamps. For example: Garrett GTX28, GTX30, GTX35 turbochargers V-Band clamp for downpipe connection on the turbine housing Garrett G25, G30, G35 turbochargers V-Band clamp for downpipe connection on the turbine housing Garrett GTX / G series clamp between CHRA and turbine housing Clamp Garrett 446937-0382 TiAL GTX28, GTX30, GTX35 / GTX40 / GTX42 V-Band clamp for downpipe connection on the turbine housing BOOST products V-Band clamps up to 63,5mm / 2.5" The material is stainless steel AISI 304 = X5CrNi18-10 = 1.4301. The use of other nuts is at your own risk. They have to have sufficient strength, corrosion resistance and self-locking function.