fits make: Jeep.

( Brand: Yella Terra ), ( Manufacturer Part Number: YT6368 ), ( Type: Jeep Inline Six ), ( Fitment Type: Direct Replacement ), ( Material: Aluminum ), ( Country/region Of Manufacture: Australia )
The YT6368 Jeep Roller Rockers are an essential upgrade for any 4.0 or 4.2 inline-six engine equipped Jeep models, including the YJ, TJ, and ZJ. These rocker arms are designed to replace the stock units, providing improved performance, durability, and reliability.
Made from high-quality forged steel, the YT6368 Jeep Roller Rockers feature a hardened roller tip, ensuring a smooth valve operation and reduced wear and tear. The roller tip design reduces friction between the rocker arm and the valve stem, which can lead to improved engine performance and fuel efficiency.
The rocker arms are also equipped with heat-treated bushings, which provide a secure and tight fit, reducing the chances of rattling and noise. The bushings are made from a durable material that can withstand high temperatures, ensuring they last for a long time.
The YT6368 Jeep Roller Rockers are easy to install, requiring no modification to the engine or head. They come with all necessary hardware, including screws and bushings, making the installation process straightforward.
In summary, the YT6368 Jeep Roller Rockers are a superior upgrade for any Jeep with a 4.0 or 4.2 inline-six engine. They provide improved performance, durability, and reliability, and are easy to install, making them a must-have for any Jeep owner looking to enhance their engine's performance.
Pros of buying YT6368 Jeep roller rockers for 4.0/4.2 Inline-6 engines:1. Improved engine performance: YT6368 roller rockers can reduce valve train friction, leading to improved engine performance, increased horsepower, and better fuel efficiency.
2. Durability: The roller rockers are made of high-quality materials, ensuring long-term durability and reliability.
3. Reduced noise and vibration: The roller rockers can reduce engine noise and vibration, providing a smoother and more comfortable driving experience.
Cons of buying YT6368 Jeep roller rockers for 4.0/4.2 Inline-6 engines:1. Cost: Replacing the factory rockers with YT6368 roller rockers can be expensive, as the parts and labor costs can add up.
2. Installation complexity: Installing the roller rockers can be a complex process, requiring specialized tools and knowledge.
3. Potential engine damage: If not installed correctly, the roller rockers can cause engine damage, such as valve bounce or valve train misalignment.
Conclusion:YT6368 Jeep roller rockers are a worthwhile investment for those looking to improve their 4.0/4.2 Inline-6 engine performance, durability, and reduce noise and vibration. However, the high cost and potential installation complexity are important factors to consider before making a purchase. It's recommended to consult with a professional mechanic to ensure proper installation and prevent any potential engine damage.
I have selected 2 methods for shipping, both USPS, ground select and med. Quadratic sells only the non-adjustable sets. I guess you can choose which method prefer, let me know also.
These are new shaft mounted aluminum roller rocker arms for the Jeep 4. There are 6 sets of 2 and the rocker ratio is as you know, links no longer allowed on. These are adjustable.