Garage Sale! › ARC Blow Off Valve Cast Pipe Adapter for CA18 (S13/180sx/Silvia) Image 1 of 2 Image 2 of 2 ARC Blow Off Valve Cast Pipe Adapter for CA18 (S13/180sx/Silvia) Sale Price: $135.00 Original Price: $145.00 *Pipe has been professionally Vapor Honed.Intended for CA18 Engines using 2” ID Piping.Made by Abbey Road Company Japan Add To Cart Added! *Pipe has been professionally Vapor Honed.Intended for CA18 Engines using 2” ID Piping.Made by Abbey Road Company Japan