Need to make a decision today between these two. Any insight from the board is appreciated.

 

Fat Cat has equal length pipes at 1 7/8 better for scavenging if you have something in front of them. Lots of posts on here about fat cats a lot of people say they are the best for performance. I ordered one for my 05 RKC to go with my build, heads, cams etc can't wait to get it all together. You can also order it with a ghost pipe if you want to keep 2 pipe look. Just my 2 cents.

 

FatCat has a much broader & flatter torque curve.

Quality, fit, and finish are 2nd to NONE.

btw - I have personally had two of each (and several others) on my own bikes over the years. FatCat is what I run now.

 

I've had both on the Heritage.

I prefer the Fatcat

The Propipe was loud, didn't make very good power, and fuel mileage went in the toilet.

IMO, the Fatcat is better built, sounds better, and I'll find out this weekend how it performs in the long haul.

 

Pro pipe for me.......but D-D is for sure better quality, Ive just fixed my pro pipe for the 3rd time, I kinda like to drop the hammer....

As for performance depends what your trying to do, on paper yes the DD seems to be better but dyno is one thing racing is another......

The shop I hang out at------ the 3 most popular 2-1' are Pro-pipe
Kerker and DD.

Just my 2 cts............

 

From what I have read the D&D is the best hands down. If they weren't so ugly I would buy one, because the numbers are definately great. V&H BSS for me until I get over the looks issue.

 

I have the V&H's. At times they are fairly loud. The sound good though all of the time. The tone is great. Wife thinks they're too loud. They look beautiful and the way the pipes are laid out the heat issue was really cut down. The shop says they are one of the best performing pipes, I'm not sure, but the bike does rev up really fast and has a lot of snap. The dyno numbers were not as high as I though they'd be, but it sure feels responsive and accelerates quick. Most people really seem to like the Fat Cats so I don't think you can go wrong either way. Look and listen to each one, if you can.