Spec-D Tuning BVA-20-RS 2.5" Turbo Charger Blow Off Valve BOV Adapter Flange Pipping Pipe Aluminum 2" Blow Off Valve Adaptor Flange Pipe Made of high quality cast aluminum Rolled end design prevent the couplers from slip out under pressure 30 Day Money Back Guarantee & 90 Days Limited Warranty Made by OEM approved & ISO certified manufacturers in materials that meet or exceed strict OEM requirements