BLUE part numbers are new for 2025 PARTS-UNLIMITED.COM 2025 | FATBOOK UPDATE ENGINE 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”. 100 PART # DESCRIPTION EMIS* 0925-1609 487 chain drive cam 3 PART # DESCRIPTION EMIS* 0925-1608 618 F chain drive cam 3 REAPER® CAMS FOR 17-24 M-EIGHT MOTORS •Produce more power and torque in the riding rpm range, improving throttle response, acceleration and fuel mileage •Smooth camshaft lobe ramps are easier on valvetrain components and eliminate excessive valvetrain noise and wear •Dyno proven and track tested •Made in the U.S.A. •See pages 821-822 of the 2025 Drag Specialties FatBook for the complete line of Feuling® Reaper® Cams for 17-24 M-Eight motors 487 CAM •487 Reaper CHOP is a great all-around camshaft and Feuling’s go to for 4 1/2 stroke 114” and 117” looking for an aggressive bolt-in •Has that nasty CHOP idle sound while producing a wide powerband that the Feuling cams are known for •Responds very well to increased bore and/or compression, exhaust system and air cleaner •Use of performance valve springs is not required but may result in a quieter, smoother running valve train; see PART #s 0926-2973 or 0926-2974 on page 789 of the 2025 Drag Specialties FatBook 618 F CAM • Requires large bore size, ported cylinder heads, ported intake manifold, high flow valves and a large throttle body •Aggressive camshaft requires high lift/high load valve springs, performance pushrods and lifters •High-flow air cleaner and triple stepped exhaust pipe are highly recommended •Feuling also recommends matching this cam with Race Series® oiling system PART #s 0932-0199 or 0932-0218 on page 852 of the 2025 Drag Specialties FatBook •3100 to 6650 rpm range NOTE: 618 F Cam requires high lift/high load valve springs (see PART #0926-3138 on page 789 of the 2025 Drag Specialties FatBook) and heavy-duty pushrods (see PART #0928-0091 on page 799 of the 2025 Drag Specialties FatBook). Clearances must be checked when installing this cam. GRIND VALVE LIFT OPEN CLOSE DURATION @ 0.053” LIFT @ TDC LOBE CENTERLINE 487 Intake 0.478 20.5° 37° 237° 0.180” 98.5° Exhaust 0.487 44° 17.5° 241.5° 0.146” 103.25° 618 F Intake 0.608 20° 42° 242° 0.195” 101° Exhaust 0.618 65° 19° 264° 0.170” 113° CAM SPECS MEASURED IN THE ENGINE ON THE LIFTER @ 0.050” USING A 1.61 ROCKER ARM RATIO PART # DESCRIPTION 0925-1607 For 17-25 M-Eight; repl. OEM #25500013 HYDRAULIC CAM CHAIN TENSIONER ASSEMBLY •Tensioner housings are precision machined from billet 6061 aluminum, pads are injection-molded nylon with PTFE added to increase wear and friction resistance •Single piston design duplicating the output pressure of stock units •Include ARP® 12-point hardware •Sold each •Made in the U.S.A. •See page 839 of the 2025 Drag Specialties FatBook for the complete line of Feuling® Hydraulic Cam Chain tensioner assemblies PART # DESCRIPTION 0925-1612 For 17-25 M-Eight HYDRAULIC CAM CHAIN TENSIONER PAD •Injection molded Nylon with PTFE added to increase wear and friction resistance •Includes chain tensioner pad and pin •Works with factory aluminum housing and hydraulic unit •Sold each •Made in the U.S.A. •See page 839 of the 2025 Drag Specialties FatBook for the complete line of Feuling® Hydraulic Cam Chain tensioner pads PART # DESCRIPTION 0925-1613 For 17-25 M-Eight HYDRAULIC CAM CHAIN TENSIONER KIT •Allows engine builders to install or replace the hydraulic cam chain system on most 17-25 M-Eight models •Includes outer roller chain PART #0925-0954, 17-tooth crankshaft cam drive sprocket PART #0925-1058, hydraulic cam chain tensioner pad PART #0925-1612 and camshaft sprocket spacing alignment/thrust washer kit PART #0925-0951 •Will also work with a combination of factory, Screamin” Eagle or S&S® cam plate systems NOTE: Included camshaft sprocket spacing alignment/thrust washer kit PART #0925-0951 will NOT fit 2023-2025 models with 121”VVT motors. PART # DESCRIPTION 0925-1611 For 17-25 M-Eight, 07-17 Twin Cam and 06 Dyna; repl. OEM #9215 0925-1610 For 99-06 Twin Cam (except 06 Dyna); repl. OEM #9198 INNER CAM BEARINGS •Outer camshaft/camplate bearings are single-row deep groove bearings manufactured by Timken® Fafnir® and are a necessity where tough applications and conditions apply •Needle inner cam bearings are heavy-duty full-complement style designed to accept the higher loads and demands of performance engines •Manufactured by Koyo® Torrington® •Sold as a 20-pack •Made in the U.S.A. •See page 848 of the 2025 Drag Specialties FatBook for the entire line of Feuling® inner cam bearings 0925-1611 NOTE: Due to the unstable nature of this 4-valve engine design with one rocker arm activating two valve springs, Feuling® highly recommends running one-piece pushrods over quick-install adjustable pushrods to maintain maximum cam/valve lift and reduce valvetrain harmonics and associated hydraulic lifter issues. NOTE: Feuling fastener kit PART #2401-0994 on page 1971 of the 2025 Drag Specialties FatBook also highly recommended to help prevent cylinder head cracking; kit replaces the rocker shaft bolts with studs and nuts to help reduce the stress of the rocker shaft standoffs. NOTE: Not for 2023-2024 models with 121”VVT motors. 0925-1609
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