We've got a video coming out shortly to answer this!

@@rinehartracing4419 great

2-1-2?

@@paulg5835 yes but its a 2 into 1 before it goes under the back of the transmission, so it still acts like a 2 into 1, at least on a bagger..

@@aussie_xsf Ahh. I see what you’re saying. Than basically just hooked the crossover to it at that point.

@@paulg5835 I would still like to compare with a 2 into 1

Yes, but no. The stock header mashes the front and rear headers together into a single pipe, but it’s not designed to function the way a collector on a 2-1 system is. We believe the stock headers are only designed that way to give a place for the catalytic converter, and performance doesn’t really enter into it. Also, routing of the stock headers makes the rear header significantly longer than the front, leading to an imbalance of backpressure. To really make power, especially torque, a collector needs to be able to provide a quick path for exhaust coming out of the motor, while also equalizing backpressure.

We don't recommend "lollipos" or any kind of inserts. In theory, they may help provide back pressure but they have a negative impact on exhaust scavenging and are also prone to coming loose and falling apart.