I see two of these pipes on Ebay right now, one raw and one plated. How much power improvement and where in the power band would these pipes have over the LRD pipe i am running now?
 

I dont have any Graphs on the LRD as of yet to compare, it is in the works. The DCS-4 was designed for:
Great Low End Punch (Special Head Pipe Design) Working to a massive midrange and a un believable top end power (over 2000 rpm) This pipe and Silencer will rip across the whole power band, see our graphs listed above.