fuel moto 2-1-2 or D&D 2-1... what is the difference in performance on the 2?

 

The 2-1 is going to produce the best performance, if tuned properly and that's with any configuration head pipe/slipon combo. the order is 2-1, 2-1-2 and then true dual's for performance

 

D&D 2-1. If properly tuned. My buddy just installed this setup. Sounds really awesome. Surprisingly not too loud, but a deep rumble. Remember no cat, so check on warranty. Please do not start another warrenty comment here!! Just a note, warranty topic beaten to death.

 

Depending on the mufflers being used and the specific engine combination performance is pretty close between the two. A 2/1/2 pipe is essentially a 2/1 with more tuned length after the collector. The main benefit of a conventional 2/1 is they generally have longer primaries for making low-mid RPM power, another consideration is it is very easy "over exhaust" on a 2/1/2 system with baffles that are excessively large which will affect power considerably, especially at low RPM. Both work really well overall.

 

Thanks for chiming in Jamie! You people have some impressive field experience.