BLUE part numbers are new for 2026 ENGINE DRAGSPECIALTIES.COM FATBOOK UPDATE | 2026 ENGINE SECTION 7 FATBOOK DISCLAIMER: *EMIS (EMISSIONS CATEGORIZATION CODE). SEE PAGES 3-5 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”. 77 PART # DESCRIPTION EMIS* FOR 17-25 M-EIGHT OIL-COOLED 114”/1 17” ENGINES (EXCEPT CVO 121”) 0904-0170 Black granite w/ highlighted cylinder fins 3 0904-0171 Wrinkle black w/ non-highlighted cylinder fins 3 0904-0172 Wrinkle black w/ highlighted cylinder fins 3 PART # DESCRIPTION EMIS* FOR 17-25 M-EIGHT WATER-COOLED 114”/117” ENGINES (EXCEPT CVO 121”) 0904-0176 Black granite w/ highlighted cylinder fins 3 0904-0177 Wrinkle black w/ highlighted cylinder fins 3 CHAIN DRIVE CAM PART # DESCRIPTION EMIS* FOR 17-25 M-EIGHT OIL-COOLED 114”/1 17” ENGINES (EXCEPT CVO 121”) 0904-0173 Black granite w/ highlighted cylinder fins 3 0904-0174 Wrinkle black w/ non-highlighted cylinder fins 3 0904-0175 Wrinkle black w/ highlighted cylinder fins 3 PART # DESCRIPTION EMIS* FOR 17-25 M-EIGHT WATER-COOLED 114”/117” ENGINES (EXCEPT CVO 121”) 0904-0178 Black granite w/ highlighted cylinder fins 3 0904-0179 Wrinkle black w/ highlighted cylinder fins 3 GEAR DRIVE CAM 132” POWER PACKAGES FOR M-EIGHT • Big-bore bolt-on kit increases your 114”/117” with 4.5” stroke M-Eight to 132” with no case machining required • Big bore 4.32” cylinders with 11:1 forged pistons •S&S oil pump/cam plate with a blue anodized finish •Passage plugs are removable for servicing •Independent scavenge sections for flywheel cavity and cam chest •Debris screen in both scavenge pickups •Magnet in cam chest to help prevent debris from entering the oil pump •Increased oil flow capacity on both the oil feed and scavenge side •Adjustable pressure relief valve can be adjusted with the unit installed in the engine •Quickee pushrods with chrome pushrod tubes •S&S premium tappets • S&S hard-anodized, black coated tappet cuffs are billet aluminum construction • Improved tappet stability in high-lift, high-rpm situations •S&S 496 cams designed for big bore applications (gear or chain drive cams available) •S&S valve springs •High-performance conical single-wire spring design • All necessary gaskets, bearings and hardware for bolt-on installation included •Original engine serial numbers are retained •Made in the U.S.A. •See page 752 of the 2026 Drag Specialties FatBook for additional 132” Power Packages for M-Eight NOTE: Not for use with H-D FL Trike models. 0904-0177 0904-0171
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