S&S 103 Cubic Inch Assembled Alternator Shovel Engine 10.7:1 Chrome, Forged Pistons, 640 Cam 3-5/8 Bore 5" Stroke, Billet Gear Cover, S&S Ignition 2 Year Warranty
Source: Custom Chrome
Based on the longstanding 103 Shovelhead Sidewinder"! kit, which has been in the S&S catalog since 1976. The 103 is similar to the other S&S Shovelhead engines, just bigger, thanks to its 5"-bore and the S&S 640 camshaft. It features S&S Super Stock"! crankcases, S&S forged steel flywheels and connecting rods, S&S billet tappet guides updated with tappets similar to those used in Evolution® Big Twin engines, S&S Quickee pushrods, S&S billet rocker boxes, S&S forged roller rocker arms, and 3-5/8" bore, engineering grade, cast iron cylinders with forged pistons that yield a compression ratio of 10.7:1. Due to the displacement and compression ratio, an S&S Super G carb and S&S dual plugged heads come as standard equipment in addition to the new Super Stock ignition system. The 103 is only offered as a 1970 thru 1984 alternator engine and features a billet cam cover. Covered by a two-year warranty.