Large Bore Exhaust System (Twin Box) ***STAINLESS STEEL*** (2 Piece System EXCLUDING Downpipe) This exhaust is useful when fitting 1275cc/1300 engines. It can also be fitted to 948/1098 engines using an appropriate manifold. Internal diameter 1.5 inch.This exhaust system requires the use of a suitable downpipe to connect to Marina (EX123) or Ital (EX124) exhaust manifolds. Alternatively use EX125 LCB manifold in place of manifold and downpipe to connect between cylinder head and exhaust.Use 2 x EX128 mounting strap and 3 x EX127 to hang the exhaust.