dragspecialties.com All part numbers in BLUE are new for 2025. SECTION 7 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 822 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”. GRIND VALVE LIFT OPEN CLOSE DURATION @ 0.053” LIFT @ TDC LOBE CENTERLINE CAM SPECS MEASURED IN THE ENGINE ON THE LIFTER @ 0.050” USING A 1.61 ROCKER ARM RATIO 405 Intake 0.395 4° 24° 200° 0.068” 103° Exhaust 0.405 36° 11° 205° 0.049” 108° 465 Intake 0.445 4° 23° 207° 0.100” 99.5° Exhaust 0.465 50° 6° 236° 0.100” 112° 472 Intake 0.468 8° 25° 213° 0.117” 98.5° Exhaust 0.472 50.7° 7.75° 238° 0.110” 111.5° 508 Intake 0.508 20.5° 37° 237° 0.180” 98.5° Exhaust 0.511 44° 17.5° 241.5° 0.146” 103.25° 521 Intake 0.518 17° 34° 231° 0.162” 98.5° Exhaust 0.521 51.5° 11.5° 243° 0.125” 110° 538 Intake 0.538 20.5° 38.5° 239° 0.180” 99° Exhaust 0.542 48° 18° 246° 0.157” 105° 592 Intake 0.578” 20° 34° 234° 0.182” 97° Exhaust 0.592” 68° 16° 264° 0.146” 116° •Feuling recommends matching this cam with Race Series oiling system •High lift valve springs are required on stock cylinder heads; see Feuling BeeHive valve spring kit PART #0926-2973 or PART #0926-2974 on page 789 •SE cylinder heads have high lift valve springs, but will need to be verified •Heavy-duty one piece pushrods are also highly recommended; see PART #0928-0091 on page 799 •2250 to 6250 rpm range •Requires High lift/high load valve springs; see PART #0926-3138 on page 789 •Heavy-duty pushrods are highly recommended; see PART #0928-0091 on page 799 •High lift valve springs, performance pushrods and lifters required •2350 to 5975 rpm range REAPER® CAMS FOR 17-24 M-EIGHT (CONT) 592 CAM •Get serious with bore size, ported cylinder heads and throttle body •Aggressive camshaft requiring high lift and higher load valve springs, performance pushrods and lifters •High-flow air cleaner and triple-stepped exhaust pipe highly recommended •Feuling also recommends matching this cam with Race Series oiling system PART #0932-0199 or #0932-0218 538 CAM •Aggressive camshaft with a nasty sound •Revs up fast and pulls hard in engines with big bore cylinders, modified cylinder heads, intake, compression and exhaust •The Reaper® 538 grind will shine in 124” and larger cubic inch engines with added compression ratio •Ported cylinder heads are not required, but will complement the cam and add even more pulling power throughout the range •The stock throttle body produces an excellent powerband and use of a high-flow throttle body will increase peak power numbers •A high-flow exhaust system and air cleaner is highly recommended for optimal performance NOTE: 2024 models with Center Cooled heads will accommodate up to the 508 cam as a bolt-in. NOTE: Screamin’ Eagle cylinder heads have high-lift valve springs and do accept the 538 grind cam. 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 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. PART # DESCRIPTION EMIS* 0925-1372 538 chain drive cam 3 PART # DESCRIPTION EMIS* 0925-1265 592 chain drive cam 3
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