WINDSHIELDS & FAIRINGS AUDIO, COMMUNICATION & MOUNTS SADDLEBAGS & LUGGAGE SEATS & SISSY BARS FUEL/AIR SYSTEMS EXHAUST TRANSMISSION & DRIVELINE ENGINE GASKETS & SEALS LIGHTING ELECTRICAL HANDLEBARS, CONTROLS & MIRRORS CABLES TANKS & OIL FILTERS BRAKES DASHES & GAUGES FENDERS & LICENSE PLATE FRAMES HARDWARE, COVERS & GENERAL FRAMES & SUSPENSION FOOTRESTS & FLOORBOARDS WHEELS & AXLES All part numbers in BLUE are new for 2026. SECTION 7 558 See OLDBOOK For Early Model Applications DISCLAIMER: *EMIS (EMISSIONS CATEGORIZATION CODE). SEE PAGES 5-7 FOR CATEGORY CODES, IMPORTANT EPA/CARB EMISSION DEFINITIONS AND REGULATORY COMPLIANCE AND NOTICE REGARDING NOISE REGULATIONS. PRODUCTS NOT LEGAL FOR SALE OR USE IN CALIFORNIA ON ANY POLLUTION CONTROLLED MOTOR VEHICLES IF NOT CATEGORIZED AS “1” OR “4”. 4 1/8” BORE LOW COMPRESSION CYLINDER KIT FOR 124” HOT SET UP KIT® •The S&S Hot Set Up Kit® for Twin Cams includes S&S 4.125” bore cylinders and forged pistons, rings, wrist pins, head and base gaskets •Pistons are a dished dome design intended for use with the stock cylinder heads •For use with 4.625” stroke flywheels for 124” displacement •Air cleaner, cams and fuel system are not included •Performance exhaust system recommended for best results •Available in wrinkle black powdercoat finish •Made in the U.S.A. NOTE: This project requires crankcase modifications. It is the responsibility of the person assembling the parts to check all clearances and assembly specifications. NOTE: Crankcases must be bored to accept the larger 4 1/8” bore cylinders. PART # DESCRIPTION 0931-1162 For 99-06 Twin Cam (except 06 Dyna)
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