The scorpion red power car exhausts are packed with features specifications include designed specifically for the subaru impreza 25 turbo sti 2014 current rear silencers pipe diameter 635mmtailpipe quad 90mm daytonared power valve no british manufactured all scorpion exhausts are hand crafted by scorpion automotive engineers in derbyshire uk guarantee all scorpion car products are guaranteed for life fittingsinstructions all scorpion products are supplied with