When looking at camshafts for diesel engines, you have two main choices: OEM (Original Equipment Manufacturer) and aftermarket. OEM camshafts are made by the same company that made your car’s engine. They’re designed to match exactly what your car had when it was new. Aftermarket camshafts, on the other hand, are made by different companies. They often offer more variety and can be customized for specific needs. Understanding the differences between OEM and aftermarket camshafts is key for making the best choice for your engine.



OEM camshafts are specifically made by the original manufacturer of your car. This ensures a perfect match with your engine, just like the camshaft it was built with. They are tailored to work seamlessly with the engine’s other components, maintaining the intended performance and reliability of your car. OEM camshafts are ideal if you want to keep your engine running smoothly without altering its original setup.

Aftermarket camshafts, are produced by different manufacturers, and come in various styles and performance levels. This means you can find one that aligns with your specific needs, whether it’s increased power, enhanced efficiency, or a particular driving experience. While they may not always be a direct match for your engine, many aftermarket camshafts are of high quality and can even exceed the performance of the original part.

With aftermarket camshafts, it’s important to ensure compatibility with your car’s model and engine type. Choosing the right aftermarket camshaft involves considering your vehicle’s capabilities and what you hope to achieve with the upgrade.


Design and Performance

OEM camshafts are created to match exactly what your car had from the factory. This means they’re perfect if you want your engine to run just like it did when it was new. They are made to the specific standards and specifications of your car’s brand, ensuring reliability and consistency. If you’re not looking to change how your car drives but just want to replace a worn part, OEM camshafts are the way to go. They’re ideal for maintaining the original feel and performance of your vehicle.

Aftermarket camshafts, on the other hand, are all about customization and enhancement. They’re made by companies that specialize in performance parts, not necessarily your car’s manufacturer. These camshafts can give your engine a boost in power, which is great for enthusiasts looking to soup up their ride.

With aftermarket camshafts, you have the opportunity to tweak your engine’s performance to suit your driving style or needs. If you want a car that goes faster, has more towing power, or runs more efficiently, there is probably an aftermarket camshaft that can help. However, it’s important to choose wisely. Not all aftermarket parts are created equal, and picking the wrong one can lead to compatibility issues or even damage your engine.

Another thing to consider is that upgrading to an aftermarket camshaft might require additional modifications to your car. This could mean more expenses and possibly more maintenance down the line. For car enthusiasts who love customizing their vehicles, the benefits of improved performance are worth it.



OEM camshafts, coming directly from the vehicle’s original manufacturer, often have a higher price tag. This extra cost is partly because you’re paying for the assurance of compatibility and quality. When you buy an OEM camshaft, you’re getting a part that’s specifically designed for your engine model. The well-known brand of the car maker can also contribute to the higher cost. This is because these brands are trusted and have built a reputation for reliability.

Aftermarket camshafts present a more budget-friendly alternative. Since they’re made by companies other than the original manufacturer, they don’t carry the brand premium. These manufacturers focus on providing parts that can fit a range of vehicles, often at a lower price. These camshafts can be especially appealing if you’re looking to enhance your engine’s performance without a hefty investment.

One of the advantages of aftermarket camshafts is the potential for improved engine performance at a better cost-to-performance ratio. This means you could get a big improvement in your engine’s performance for the money you put in. It’s a cost-effective way for car enthusiasts to customize their vehicle’s performance according to their preferences. 

Also, while saving money is a benefit, remember that the cheapest option isn’t always the best. Investing in a higher-quality aftermarket camshaft may cost a bit more initially, but it can be worth it in terms of long-term durability and performance.


Quality and Reliability

OEM camshafts are well-regarded for their quality and dependability. This is because they have to meet the high standards set by the car’s manufacturer. When you buy an OEM camshaft, you’re getting a product that’s guaranteed to work well with your engine. These camshafts are made to be exactly like the ones your car had when it was new. This consistency means you can trust that they’ll fit right and function properly.

The quality of aftermarket camshafts can be more unpredictable. Some aftermarket camshafts are just as good as, or even better than, OEM ones. These high-quality aftermarket camshafts often come from reputable manufacturers known for their engineering and production excellence. They might offer advanced features or specialized designs that OEM camshafts don’t have. This can be great if you’re looking for a performance boost or a specific type of engine behavior.

However, not all aftermarket camshafts are of high quality. Some might be made with lower-quality materials or less precise manufacturing processes. This could mean they don’t last as long or work as well as OEM camshafts. It’s important to do your research and choose aftermarket products from trusted brands. Reading reviews and seeking recommendations from experienced mechanics or fellow car enthusiasts can help.


Customization and Variety

Aftermarket camshafts offer a wide range of options, letting you choose one that fits your specific performance goals or upgrades. They’re great if you want to modify your car for more speed, power, or even just a different kind of driving experience. With aftermarket camshafts, you can tailor your engine to do what you want it to, like going faster or being more fuel-efficient.

On the other hand, OEM camshafts are made to match the exact specifications of your car model. They’re designed to work just as the original camshafts did when the car was first made. This means they’re a good choice if you

want to maintain the original performance and reliability of your engine. OEM camshafts ensure that your car runs as it was designed by the manufacturer, with no unexpected changes in its behavior.


The choice of OEM or aftermarket camshafts is up to each car enthusiast and what they seek from their vehicle. If maintaining the original performance and ensuring a perfect fit is a priority, OEM camshafts are the way to go. They provide peace of mind with their high reliability and quality standards set by the car manufacturer.

For those looking to enhance their vehicle’s performance, be it for racing, better efficiency, or just for a more customized driving experience, aftermarket camshafts are an excellent choice. They offer a range of options at potentially lower costs, allowing for more room to experiment with different enhancements.

Remember to research and choose a trusted aftermarket brand for a good quality and compatible camshaft. Additionally, considering the possible need for further engine modifications and the impact on vehicle warranty is crucial. Ultimately, whether to choose OEM or aftermarket camshafts depends on individual preferences, budget, and the desired outcome for the vehicle.