CISON L4 Upgrade: Key Improvements You Need to Know | Stirlingkit

Following the success of the CISON L4-175  and the L4-205 in February 2025, we are proud to launch the all-new CISON L4-26CC Miniature Inline 4-Cylinder Engine. Building on the strengths of its predecessors, this upgraded engine delivers enhanced performance, improved stability, and an immersive DIY experience—perfect for RC car enthusiasts, hobbyists, and collectors alike.

Key Upgrades

• Fresh New Design: The previous blue cylinder head is now upgraded to a striking red top cover paired with a silver cylinder body, enhancing both aesthetics and collectible value.
• Increased Power: Displacement rises from 20.5cc to 26cc, delivering over 20% more power while maintaining smooth operation.
• Optimized Spark Plug and Exhaust: Features a brand-new spark plug type and an integrated 4-in-1 exhaust header, producing a more distinctive and powerful engine sound.
• Improved Carburetor & Cooling System: Upgraded independent carburetor allows easier tuning; the wet water-cooling system and independent lubrication ensure reliable long-term performance.

Product Features

1. Immersive Engine-Building Experience
Step into the fascinating world of miniature mechanical engineering. The L4 kit contains hundreds of precision-crafted metal components, allowing you to build your very own L4 engine from scratch, providing both challenge and satisfaction.

2. Compact Yet Powerful
Despite its small size, the L4 engine delivers impressive power. Featuring a large displacement, advanced OHV valve system, and long-stroke design, it generates high torque far exceeding other engines of similar size.

3. Durable and Stable Performance
Equipped with an independent lubrication system and external oil pump for optimal lubrication, and using wet water-cooling technology to lower operating temperatures, the engine ensures long-lasting, reliable performance.

4. Responsive Throttle and Rich Engine Sound
Metal intake and exhaust pipes, precision-formed, along with a biomimetic carburetor, make tuning simple and responsive. The engine produces a low, powerful roar for a truly immersive audio experience.

5. Precision Craftsmanship
CNC-machined engine body, triple-ring piston design, high-precision hardened cylinder sleeves, and integrated hardened crankshaft ensure every part is meticulously crafted. Surface sandblasting and oxidation treatment enhance both feel and appearance.

6. Convenient and Stable Ignition
Includes a compact, interference-resistant L4-specific CDI ignition system, providing reliable ignition performance even with remote-control electronic devices.

7. Perfect RC Compatibility
Lightweight and compact, this engine is ideal for 1/8 and 1/14 scale RC crawlers, off-road vehicles, and trucks—delivering powerful performance as if it were the “heart” of your model.

The CISON L4-26CC Miniature Inline 4-Cylinder Engine is more than just a high-performance engine—it’s a mechanical masterpiece combining power, craftsmanship, and hands-on enjoyment. Whether you are an RC enthusiast, a mechanical hobbyist, or a collector, this upgraded L4 engine promises unmatched performance and an extraordinary building experience.