Broadens and smooths out power curve for improved engine response
Boosts low end, mid, and over-rev gains for enhanced performance
Lightweight 20 gauge steel body and 19 gauge steel header for durability
Hand-pounded seams ensure smooth flow transitions
Includes O-rings on most models for secure installation
Summarized by Shop
The Factory Fatty is reminiscent of the “works” or cone pipe once used by Factory Teams. It shares many of the same characteristics with its’ craftsmanship and material quality. The Factory Fatty broadens and smoothes out the power curve while boosting gains throughout the entire power band, more low-end, more mid, and increased over-r