Choose from the widest range of finest quality stainless steel exhaust systems, manufactured to our own exacting standards by Double S Exhausts, Britain's premier stainless exhaust manufacturer. Made from 309 and 401 grade stainless steel with mirror finish silencers, each system is produced to accurate tolerances for easy DIY fitment and is supplied with a limited Lifetime Guarantee (*Non-Transferable). Sports and Standard Systems Sports systems are designed for optimum performance and improved bhp with a sporty exhaust note. Standard systems provide efficient gas flow with the distinctive MG exhaust tone. Sports Free Flow Systems Sports Free Flow Systems for MGB & GT with twin rear tailpipes and choice of bomb or standard centre box. Free flow systems lower back box pressure, creating extra BHP. Kit Contains: X 1 BMG19 (Front Pipe); X 1 BMG21 (Centre Box); X 1 BMG27 (Interpipe); X 1 BMG23FF (Free Flow Rear Box); X 1 BMG100 (Centre Hang Bracket).