Lambretta Manifolds with Round or Oval Flange: Which to Choose Based on the Cylinder

In the world of Lambretta tuning, choosing the right exhaust manifold is essential to ensure optimal performance, especially when adopting high-performance aftermarket cylinders. In this article we analyze two specific types of exhaust manifolds, both painted with clear gloss, designed for perfect integration with the Montellery and Chimera expansion mufflers, and in general with all the mufflers/expanders compatible with the diameter of the manifold.

1. Exhaust Manifold with Round Flange – TS1 Connection

The round flange manifold has been designed to be compatible with cylinders type TS1, Monza, Casa SS225, Stratos 225; known for their reed valve intake layout and high performance. This configuration provides a round connection that interfaces directly with the cylinder outlet, ensuring optimal sealing and a smooth exhaust gas flow, without turbulence.

The glossy clear coat applied to the manifold offers effective protection and also enhances the aesthetics of the component, keeping the metalwork visible.

2. Exhaust Manifold with Oval Flange – Standard Connection

For those who use cylinders with a traditional exhaust outlet, the oval flange manifold is the ideal solution. This model is designed for the standard connection, while maintaining total compatibility with Montellery and Chimera expansions. Also in this case, the flange ensures precise assembly, avoiding compression losses in the exhaust.

The treatment with glossy transparent varnish protects the component over time and facilitates cleaning, as well as offering a refined technical appearance.

Compatibility and Assembly

Both manifolds have been designed to ensure a precise fit with the Montellery and Chimera expansion mufflers, avoiding additional modifications or complex adaptations. The profile and geometry of the manifold ensure the correct position of the expansion, promoting a correct exit angle and effective evacuation of the burnt gases.

Conclusion

Choosing the right manifold based on the type of cylinder used is a fundamental step for those who want to optimize the performance of their Lambretta engine. Both versions – with round flange for TS1 and with oval flange for standard connection – represent reliable, resistant and technically valid solutions for road or sports use.

Assistance and Information

For technical questions or special requests, contact us by email:
📩 info@scooterthefero.com