One of the loudest valves in the range, the Mach 1 will ensure you’re heard before you’re seen! Featuring a single trumpet discharge outlet, this is a good replacement for factory valves and can help to reduce turbo lag and increase throttle response while blasting out a great WHOOOSH! noise between gears. The Mach 1 and Plumback valves have now been combined into one affordable unit - the new Mach 1 kit comes complete with the parts required to make this valve vent to atmosphere for maximum noise, or plumb back for silent - and very importantly - LEGAL - operation. Like the Stealth FX and Deceptor Pro, the Mach 1 is now also available in a black anodised finish for those who prefer keep things a little more clandestine. The Mach 1 comes standard with a 35mm base (part # 5035), which can be hose-mounted into 32-35mm I.D. hose, or pipe mounted onto 1" metal pipe. A short length of 1" steel pipe is included in the kit for custom weld-on applications. The supplied plumb back outlet is 30mm (part # 5230). Colours available: red, blue, silver or black.