FX Engines Muffler 3.5Ccm EFRA 2108

The FX Engines Muffler 3.5cc EFRA 2108 (FX659502) is a polished, EFRA-approved tuned muffler designed and tuned to work with FX engines. Engraved with the EFRA 2108 number, it is recommended for applications where increased bottom-end performance is desired, helping deliver strong drive out of slower corners and tighter sections.

Developed by FX Royal Racing Engines, this muffler pairs best with appropriately selected manifolds to tailor power delivery to track layout and driving style.

Manifold Recommendations

• Short Manifold: Recommended for tracks with long main straights to achieve the highest RPM, but with reduced bottom-end performance in the low RPM range.
• Medium Manifold: Recommended for medium (or "standard") sized tracks.
• Long Manifold: Recommended for short tracks where bottom-end, lower-RPM performance is required.

Optional Manifolds

• 659704 – Medium Manifold

Suggested Compatibility

• FX Engines 3.5cc nitro engines