Had my bike custom tuned a few weeks ago. The guy said the V&H BSS I have are not the best for making power. On the dyno sheet you can see it and now while riding it, I can feel the dip in tq around the 3-4k rpm range. His suggestion was the D&D Fat Cat for maximum power.

I guess it's the closest to equal length headers we can get? That seemed to be the most important thing he mentioned was the pipes being equal length for maximum power.

 

Just my two bits here.
Installed the D&D 2 into 1's from AMS Machine Shop last week. By the way, Steve is great to work with. Install and fit was snug but perfect. Did a 350 mile trip on the new D&D Fat Cat's with Quiet Baffle this past weekend.

First couple hundred miles they sounded a little less than expected. Then the last 150 miles over a mountain pass it seemed like these pipes and the Dyna Super Glide Custom really began to wake up and work together nicely. The sound is a very nice deep throaty sound and the seat of the pants response is very impressive throughout the RPM range. Definitely recommend D&D FAT CATS.
Have Stage 1 A/C with K&N and an XIED for AFM. Looked at the plugs after the trip and they may be just a smidgen on the lean side. No undesirable issues noted so far as AFM and back fire etc.

Gary
2009 FXDC, etc., etc., etc. and the list goes on.

 

+1 on the Fat Cats.

Many people in my area think the best performance shop around here is Rosa's Cycle and they've been suggesting The Fat Cats on all their performance builds.

bigdaddy33