Race Series® camshaft kit with short travel lifters - RS 521 CD W/C M8

7075 billet aluminium oil pump, 50% harder and more robust than the original, maintains tight tolerances at temperature.
Short-stroke hydraulic tappets with 0.115" total travel; increase rpm by reducing valve float and valvetrain vibrations, maintaining quiet operation.
Deeper scavenging ports than the HP+ series for greater evacuation flow.
30% more gear pressure volume than original for M-Eight Twin-Cooled engines
53% greater recovery gear volume compared to the original for M-Eight Twin-Cooled engines
27% higher pressure and recovery gear volume compared to original for M-Eight Oil-Cooled engines
42% greater suction volume with ducts and holes matched to the engine casing for M-Eight Twin-Cooled and M-Eight Oil-Cooled engines.
68% more oil volume to the crankshaft and connecting rod bearing for M-Eight Twin-Cooled™ and M-Eight Oil-Cooled engines
Engine temperatures 15°-25° lower for M-Eight Twin-Cooled™ and M-Eight Oil-Cooled engines
Oil temperatures 15°-30° lower for M-Eight Twin-Cooled™ and M-Eight Oil-Cooled engines.
10-30 psi additional oil pressure for M-Eight Twin-Cooled™ and M-Eight Oil-Cooled engines.
Increases oil pressure, reservoir volume and engine oil flow
Reduces wet sumping, blowby and oily air filters
Magnets in the oil pump to protect gears and pressure relief valve
Test results show a gain of 2 hp and 2 ft/lb of torque at the rear wheel on M-Eight
Feuling test results show a 50% reduction in sump oil level
Kit includes: Race Series® high-flow oil pump, High Flow billet cam plate, Reaper® Series camshaft, Race Series® short hydraulic lifters, one-piece pushrods, Timken®/Koyo® cam bearings, rocker studs/nuts, seals, O-rings, ARP® cam/crank bolts, washers, moly paste and Loctite®.
Manufactured in the USA
Not suitable for '23-'24 models with 121" VVT engine.
Requires high-lift valve springs.
Includes:
• High volume Race Series® oil pump
• High-flow billet cam plate
• Reaper Series® camshaft 521
• Race Series® short-travel pegs
• Single-piece pushrods
• Timken/Koyo cam bearing
• Swingarm bolts and nuts
• Gaskets
• O-rings
• ARP cam/crank fixings
• Washers
• Molybdenum lubricant
• Loctite



Specifications


Brand
FEULING PARTS


Supplier reference
7266ST


Application
Exhaust, Intake


Features
Twin Cooled


Intake cam centre
98,5°


Exhaust cam centre
110°


Intake closure
34°


Exhaust Clamp
11,5°


Intake duration
231°


Exhaust duration
243°


Intake valve lift
0,518"


Intake valve lift at TDC
0,162"


Exhaust valve lift
0,521"


Exhaust valve lift at TDC
0,125"


Model
Race Series®


Product name
Camshaft housing kit


Type
Chain


Units
Kit


Open intake valve
17°


Open Exhaust Valve
51,5°


Version
Serie 521