659502 Muffler 3.5cc EFRA 2108

FX Royal Racing Engines EFRA 2108 tuned muffler.

This polished muffler is EFRA approved and is recommended for applications that require more bottom-end power. Specially designed and tuned to work with FX engines. EFRA number engraved.

Optional Manifolds:

• 659704 - Medium Manifold

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.