[chasarms]

You don’t hear “2-2” all that often. More commonly, you’ll hear “true duals.” Either way, that means the two heads are exhaust vented completely separately all the way to and through the muffler. The pros are they have the most “Harley” sound. Cons are that they typically don’t tune very well compared to other designs.

A 2/1/2 has a crossover that merges the exhaust between the heads and the mufflers, and then splits to the mufflers. This controls exhaust flow better and they tend to tune for higher torque numbers. A 2/1 never splits and just uses one muffler. A performance 2/1/2 header with “y” style crossover similar to a 2/1 will typically tune very close to a 2/1 with the right mufflers.

 

[chasarms]

Thanks for the education, appreciate the help. Sounds like 2/1/2 would work best for me anybody got a coupon they sure don’t give them away do they . Haha thanks again

They are not cheap, but I used the Fuel Moto 2/1/2 on my Ultra. It tuned VERY well.

 

[chasarms]

I just put "true duals" on my '04 RKC. The rear header had cracked almost all the way around. I didn't have as many options for my bike, as it's older. But I found Cobra True Duals for it to attach to the Tri-Power mufflers from Cobra. My '04 is a 95 incher, 203 cams, flashed, SE air filter, SE Hybrid Cam Plate with High Volume oil pump. When I started it after the true dual install, my wife said "Wow! You only changed the headers?" The sound, compared to the stock header with the same mufflers, is definitely meaner. Performance-wise, on a short ride to make sure everything was okay, I only noticed one small difference. Right off the bottom, like when leaving a stop light or sign, there seems to be the tiniest reduction in low end torque. Nothing massive, but it's different. It's no problem for me, but something to consider if you're a lugger. If I had more options, I would have done the 2-1-2 as I like the collector, but I also love the dual exhaust look from the back of the bike.

Like you, I like the look of "true" duals. I have the S&S Power Tune Dual header on my bike. It looks like a true dual header, but it has a crossover.