i have fmf gold series and cannot afford shearers or cpi's so im buying used t5s for cheap just bc i think any pipe would be better than the fmf that r on my bike. they suck imo. i ride woods and drag accross fields and shit and they have no top end watsoever. i wuold rather have more top and less bottom even in the woods. ihave nvr run another pipe on my shee but have rode other similar modded shees with other pipes and they bahave way dif.