Introducing the GFB SV45 - The latest and BIGGEST addition to our extensive range, designed specifically for drag racing and big horsepower engines. 45mm piston and three large flared outlets, the SV45 flows like nothing else! Key features •  Capable of supporting in excess of 1000hp! •  Massive 45mm piston, with smooth flow contouring. •  Three flared venting ports cut into the body with a dual angle, •  Designed to match the piston at full travel for the smoothest flow path •  Tapered Acetal piston seat for a perfect seal under boost. •  Unique ball-type attachment method for a fast, easy and reliable installation. •  Comes with two springs to suit all engine types. •  Aluminium weld-on adaptor supplied, stainless steel also available (part # 6408) Colour available: Blue