Reaper® 508 cam

Increases power and torque in the driving RPM range, improving throttle response, acceleration and fuel consumption
Smooth camshaft ramps protect valvetrain components and eliminate excessive noise and wear.
Dyno and track tested
The Grim Reaper offers aggressive pulling power and a punchy sound
This camshaft revs up faster than the 521 grind, sounds more aggressive and offers greater thrust, but is more difficult to adjust.
The Reaper 508 profile excels in engines of 114" or more cubic inches with a higher compression ratio
Ported heads are not required, but they complement the camshaft and increase power across the entire range
The standard throttle body offers excellent power delivery; the high-flow throttle body increases maximum power
A high-flow exhaust system and air filter are highly recommended for optimal performance
High-lift valve springs required
High-strength pushrods recommended
Range from 2250 to 5900 rpm
Manufactured in the USA
Camshaft specifications measured in the engine on the tappet @ 0.050 using a rocker arm ratio of 1.61.
Due to the unstable nature of this 4-valve rocker-actuated dual-spring engine design, Feuling strongly recommends using solid pushrods rather than quick-adjustable ones to maintain maximum cam/valve lift and reduce vibrations and issues associated with hydraulic lifters.
EU: The Reaper 508 grind excels in engines of 1.87 L or more with higher compression ratios.
Not suitable for '23-'24 models with 121" engines.



Specifications


Brand
FEULING PARTS


Supplier reference
1349


Application
Exhaust, Intake


Intake cam centre
98,5°


Exhaust cam centre
103,25°


Intake closure
37°


Exhaust Clamp
17,5°


Intake duration
237°


Exhaust duration
241,5°


Intake valve lift
0,508"


Intake valve lift at TDC
0,180"


Exhaust valve lift
0,511"


Exhaust valve lift at TDC
0,146"


Model
Reaper


Product name
Cam


Type
Chain


Units
Unit


Open intake valve
20,5°


Open Exhaust Valve
44°


Version
508 Series