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 COMP Cams CL12-242-2 Xtreme Energy camshaft kit is an excellent choice for those looking to enhance the performance of their Chevrolet Small Block engines, especially the 350 variant. It comes with a hydraulic flat cam and lifters, which are designed to work best for street machines. The lift specifications of 0.477" and 0.480" along with a duration of 224/230 at .050" support robust power while still maintaining reasonable drivability, making it a solid option for those who want to maintain some everyday usability in their vehicles.

One of the notable strengths of this camshaft is its RPM range, which operates effectively between 1,600 to 5,800 RPM. This range is ideal for street applications, allowing for responsive acceleration in most driving situations. The 110-degree lobe separation angle contributes to smoother idle quality and improved vacuum, which is particularly beneficial for power brakes.

This camshaft does have some limitations. It is best suited for use with aftermarket intake manifolds and headers, meaning that users looking for a straightforward installation with stock components might find it less than ideal. Additionally, it performs optimally with a stall converter of 2000 RPM or higher, which may require further investment if your current setup doesn't meet this specification. It's also important to note that this camshaft does not fit LT1/LT4 or factory roller Small Blocks built from 1985 and newer, which could restrict its usability for some vehicle owners.

The COMP Cams 12-433-8 Xtreme Energy camshaft is designed specifically for Chevrolet Small Block engines, making it an attractive choice for enthusiasts looking to enhance performance in both street and strip settings. With a lift of .520”/.540” and a duration of 236/242 at .050”, it provides solid responsiveness, particularly in the 2,500-6,000 RPM operating range. This camshaft is ideal for setups with at least 9:1 compression and is best paired with aftermarket intake manifolds and headers, which can bring out its full potential.

One of its strengths is the ability to maintain more vacuum, facilitating greater duration without sacrificing performance. This can be particularly beneficial for those utilizing power brakes, offering a smoother driving experience. The quicker opening lobe profiles are another highlight, as they contribute to increased responsiveness and more power under the curve, making it a good fit for spirited driving.

However, there are some limitations to consider. The camshaft is designed for a rough idle, which may not suit everyone’s taste, especially for those looking for a more refined street experience. Additionally, its fitment is restricted to earlier Chevrolet Small Blocks, meaning it won't work with LT1/LT4 engines or newer factory roller blocks. This could restrict options for some users who might be interested in upgrading their more modern engines.