1 x 4270BR . The superior Bell XK120 Single Box Exhaust System in stainless steel for Right Hand Drive models. We consider Bell to be the best sounding exhaust out there,  and yes,  they do sound nice! Original Ref. C3523. C3524. C3659 

The front pipe is a 2-into-1 'Y- shape pipe' in a 2 inch bore, which comes  from the standard  cast manifold flanges down, which passes through the single chassis hole with the essential flexy section which absorbs the engine movement . It then joins to a single box which exits with a single end tailpipe.

NOTE: Please state Left or Right Hand Drive as the front pipes vary and so are made up to order and may entail 2 weeks lead time.

We also stock the Bell a superb dual tailpipe or Sports Twin exhaust that features a similar 2 3/4" front pipe that passes through the single chassis hole, then goes into a  splitter silencer box with twin 2" tailpipes. SEE:  4271L