Allows direct bolt-on fitment of GFB Mach 2 part # T9135, Hybrid part # T9235, Respons part # T9035, and Deceptor Pro II part # T9535. This adaptor fits onto the factory bypass valve mounting point on S14 and S15 200SX models, using the rubber mounts from the factory valve. The GFB valve then fits onto the vertical pipe, which leans toward the front of the car so the spring pre-load screw is accessible.