SU Carburettor USED H Type T2 Horizontal Float Chamber, 2 5/16" Diameter, 1208. To Suit Early XK-120 and MK VII this is the front float chamber only. On later cars, it fits front and rear. It fits front and rear on all XK-140. Specifically: For XK-120 up to Engine W.4095, this fits front only; for engines after W.4095 and all F-series engines, it fits front and rear. For MK VII Engines A.1001 to A.2735 it fits front only. It fits front and rear from Engine A.2736 and all B-, D-, and N-series engines. Again, this fits front and rear on all XK-140. Please see photo(s) - they form part of the description.