10 Best Camshaft For 350 Chevy 2025 in the United States

The COMP Cams K12-600-4 Thumpr camshaft is designed for those looking to improve performance in Chevrolet Small Block engines, particularly popular in muscle cars and street rods. This camshaft boasts impressive specifications, including a lift of 0.479"/0.465", 227/241 duration at .050", and a 107-degree lobe separation angle. It operates optimally within a 2,000 to 5,800 RPM range, making it a solid choice for spirited street driving and racing scenarios.

One of its main strengths is the distinctive choppy idle it produces, which many enthusiasts find appealing. This camshaft is especially effective when paired with aftermarket converters and rear gears, enhancing the engine’s power band and creating a powerful, throaty exhaust note that muscle car fans crave. Users appreciate the inclusion of a comprehensive K Kit, which typically contains not just the camshaft, but also lifters, valve springs, retainer kits, and timing set, facilitating a complete upgrade.

There are some drawbacks to consider. This camshaft is best suited for performance applications and may not be ideal for daily drivers or those who prefer a smoother idle. Additionally, it does not fit newer LT1/LT4 engines or factory roller Small Blocks built from 1985 onward, which can limit its applicability.

The Competition Cams 12-600-4 Thumpr camshaft is designed for Chevy small block engines, offering a noticeable performance boost for street use. With advertised durations of 279/297 and actual durations at .050 inch of 227/241, it provides strong valve lift (.479 intake / .465 exhaust) and a lobe separation angle of 107 degrees. This setup results in a choppy, thumping idle, which some enthusiasts enjoy for its aggressive sound, but it may be less comfortable for daily drivers. Best suited for engines with a 2000+ stall converter and upgraded gears, it delivers good power in the mid to upper RPM range, making it ideal for street performance or mild competition use.

Keep in mind, this cam requires upgraded valve springs due to its aggressive profile, adding to installation considerations. Installation is straightforward with a bolt-on design specific to Chevy 350 engines. Weighing about 8.6 pounds, it is a quality, machined camshaft known for reliability. While it excels at enhancing throttle response and engine sound, those seeking a smooth idle or low-RPM drivability might find it less suited.

This camshaft is a strong choice for Chevy 350 owners looking to add a distinctive lope and improved mid-range power without going full race cam.

The COMP CAM 12-602-4 Big Mutha Thumpr camshaft kit is designed for Chevrolet small block engines, including the 350 Chevy, and targets enthusiasts looking for noticeable performance gains on street or strip setups. With a lift of .500/.486" and duration of 243/257 degrees, this camshaft offers a strong boost in power and throttle response, making it ideal for those wanting a louder, more aggressive engine feel.

The included components, like high-performance hydraulic lifters, a double roller timing set, and push rods, ensure you get a complete kit that’s ready to install, which adds value especially for users wanting a reliable, matched upgrade. The 4-degree crank offset and the cam’s specifications suit engines with around 9.5:1 compression and require supporting mods like intake gears, headers, and a 2800+ stall converter to work best.

This camshaft produces a very rough idle, which might not be ideal if you want a smooth daily driver. It is best for those who prioritize power and sound over quiet operation or fuel efficiency. This kit is an excellent option for Chevy 350 owners seeking a bold performance upgrade with quality parts included, but users should be prepared for a coarse idle and the need for complementary modifications to unlock its full potential.