2 into 1 vs. 2 into 2 pipes

[jimmy888]

2 into 1 vs. 2 into 2 pipes

what is the diff and withch is better and why

[sirbOOm]

YouTube - Exhaust Systems and Performance: 2-into-1 vs. 2-into-2

Watch this. Done.

2:1 = low and mid RPM range power increases
2:2 = high RPM range power increases

You will appreciate the power increase most from a 2:1 but a 2:2 looks better in most opinions and you can get 2:2s with a "Power Chamber" or "Cross Over" which connects to the two pipes together in line at some point (like an X-Pipe on a Mustang).

[Dave63]

^^^ will agree. 2-1 produces more HP and torque nunbers in the midranges, (Where most owners ride at...) then 2-2 set ups.....

Dyno numbers prove it.

[jdlangdon]

Originally Posted by sirbOOm

You will appreciate the power increase most from a 2:1

Isn't the Fatbob's 2:1 Tommy Guns actually a 2:1:2?

jd

[mheders]

I run drag pipes and wouldn't have it any other way. Can't beat the obnoxiously loud "wake the neighbors" sound at 6:30 in the morning...

I do sacrifice power, but worth it, even on the highway....

[Lucky Chucky]

Yes my fat bob is 2-n-1-n-2. But I'm still waiting for the mailman to bring me my Big Radius 2-n-1 Chrome Vance and Hines. Who's gonna burst my bubble and tell me I have to buy something else like a commander for the CVO? I swear Narley engineers are aliens.

[draperfish]

My black Thunderheader with heat wrap ROCKS!

[Icepick]

V and H told me there is a remarkable difference in noise levels between the 2 in 1 and the 2 in 2. 2 in 2 are supposed to be ALOT louder, i'm considering the 2 in 1 if I get the new Fat bob.
My buddy has the Long shots and they're painfully obnoxious at higher rpms when he leaves in a hurry.

M.

[Ohutchins]

i have heard nothing but great things about thunderheaders. I wish i could afford one right now but for the time being im sticking with the $50 dollar drag pipes.