Lucas Distributor Part Number. Jaguar Mk VIII (8). Jaguar Mk IX (9). ONE (1) Set. Replaces:~ 420197 - CS16 - DSB116C. 40578B/D (DMBZ6A) 7:1 Compression Ratio 1957-59. Do not make a costly mistake! If you do fill up with E10, dilute with E5 as soon as possible.
