We recently came across a 2-page spread of Mugen valve covers produced from 1973 to 2001. Called "MUGEN - One of the Art," the pages lay out 23 photos of Mugen valve covers spanning three decades of racing and performance.
1973 MF-318 - 1.3L L4 FJ1300:
1988 MF-204 - 2.0L L4 16V F-3:
1988 MF-308 - 3.0L V8 32V F2000:
1989 MF-358 - 3.5L V8 32V F-1 spec.:
1990 D16A BASE - 1.6L L4 16V SCCA GT3:
1992 MF-351H - 3.5L V10 40V F-1:
1993 MF-308 - 3.0L V8 32V F3000:
1993 MF-308 - 3.0L V8 32V F3000:
1994 MF-204 - 2.0L L4 16V F-3:
1994 MF-351HC - 3.5L V10 40V F-1:
1994 MF-351HD - 3.5L V10 40V F-1:
1995 H22A BASE - 2.0L L4 16V JTCC:
1995 MF-301H - 3.0L V10 40V F-1:
1996 MF-204A - 2.0L L4 16V VTEC F-3:
1996 MF-301HA - 3.0L V10 40V F-1:
1997 MF-204B - 2.0L L4 16V F-3:
1997 C32B BASE - 3.4L V6 24V JGTC:
1997 H22A BASE - 2.0L L4 16V JTCC:
1997 MF-301HB - 3.0L V10 40V F-1:
1998 MF-301HC - 3.0L V10 40V F-1:
1999 MF-301HD - 3.0L V10 40V F-1:
2000 MF-301HE - 3.0L V10 40V F-1:
2001 MF-408S - 4.0L V8 32V Le-Mans/ALMS:
All 23 Mugen valve covers: