BILLET TAPPET BLOCKS
for EVOLUTION® BIG TWIN

Front anf Rear Tappet Blocks for Evolution® Big Twin 1984 & later are sold with eight chrome allen bolts. Replaces OEM 18540-83A & 18540-83A.
Sold as set.
91-613 Chrome tappet blocks.

91-614 Black tappet blocks.
91-697 Chrome tappet blocks
for 4"+ bore motor case, used on Ultima Engines 100 C.I. and larger.

ULTIMA® BIG AXLE HYDRAULIC LIFTERS

91-880 Ultima hydraulic lifters for use on 84 & later Big Twins,1986 thru 1990 Sportsters & Buell 1987 thru 1990. .842” O.D.
Replaces OEM 18523-86
91-883 Ultima hydraulic lifters for use on 883cc & 1200 Sportster 1989 thru 1998.
OEM 18526-89A, 18521-92A
91-884 Ultima hydraulic lifters for use on Twin Cam 1450cc 1999 & later, 4-cam Sportster 883cc, 1200cc XL 1999 & later.

91-898 Hy Lift Johnson stock lifters for M8 Twin Cam® 1999 & later, inc Mil rpls, OEM 18538-99