DYNO Cams are the industry standard.

275 is a drop-in with no other upgrades needed. 308 is the highest you can go with stock rockers, but you need to upgrade the flywheel, rod and valve springs. 310 and 335 are mid-range, 356 is for racing, all requiring flywheel, rod, valvetrain and carburetor upgrades.

How to choose a Performance Camshaft for a Honda GX200 engine

The BILLET Camshaft for GX200, 6.5 OHV, and 212 Predators offers a range of grind options defined by both lift values (275, 308, 335, 356) and lobe separation angles (108°, 110°, 112°, 114°), each combination influencing engine performance in distinct ways.

**Lift 275**: With lower lift, these camshafts paired with tighter lobe separations (108°–110°) enhance low-end torque and improve throttle response by increasing valve overlap for better scavenging at lower RPMs. A wider lobe separation (112°–114°) in this lift range softens overlap, promoting smoother idle and slightly better fuel efficiency. - More power, easy on the engine.

**Lift 308**: Offering a moderate lift, these grinds with narrower lobe separation angles (108°–110°) provide a spirited mid-range power boost with increased valve overlap, favoring performance-oriented daily use. Wider angles (112°–114°) reduce overlap, improving drivability and stability at idle while maintaining respectable power. -  The highest you can go with stock rockers.

**Lift 310**:  Has all the duration of bigger cams, but with .310" lift, so ratio rockers can be used in OHV modified applications. This cam requires an upgraded spring package, billet rod, and billet flywheel.

**Lift 335**: Higher lift cams paired with narrow lobe separation (108°–110°) optimize high-RPM power by intensifying valve overlap, enhancing cylinder filling and exhaust scavenging. Increasing the lobe separation to 112°–114° trades some peak power for smoother transitions and better low-end characteristics. - 

**Lift 356**: The highest lift cams combined with tighter lobe separations provide maximum valve opening and aggressive overlap, making them ideal for peak horsepower and racing applications. Wider lobe separations reduce overlap and temper the aggressive nature, offering improved control and streetability while retaining strong top-end performance. This is the highest level.

Selecting the right combination of lift and lobe separation enables precise tailoring of valve timing dynamics—balancing power, torque, and engine smoothness—to meet specific performance goals in GX200, 6.5 OHV, and 212 Predator engines.