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3 1/2" bore and oversized 1984 thru 1999 Evolution Big Twin and 1986 thru 2003 Evolution Sportster
S&S cylinder torque plates simulate stress conditions when boring and honing cylinders. Machined from chrome-moly steel. S&S torque plates can be used in conjunction with an S&S boring fixture and a conventional boring bar, and they can be readily adapted to a Sunnen type honing machine. Kits contain a head end plate, base end plate, 4 long grade 8 socket head cap screws to hold the assembly together and to supply pressure, as well as a stop arm that keep the cylinder and plates from turning while honing. Note: Special torque plates for use with S&S pattern Big Bore cylinders are available upon Special Order.