Our Mazda MX-5 Mk1 Decat Pipe replaces the standard restrictive catalytic converter with a single piece decat pipe allowing for improved exhaust gas flow, increasing horsepower and improving throttle response in the process. Features: Manufactured from T304 stainless steel 2" bore TIG welded, CNC machined flanges Direct replacement for standard item Supplied with gaskets and bolts Please note: sold for off road and track use only (will not pass an MOT test when fitted).