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: