It's the pipe that comes out of the faring and bolts to the muffler. It shrinks down to a little over 1" inside.
Slip ons and bolt ons are 1 in the same, just a different term..
On a Busa, they are refered to as bolt ons, because they .....bolt on.
ALL it is, is a replacement muffler. They give you only a couple of HP, but better sound.
MOST people think the Busa is fast enough and don't care about a performance gain, but that wanna sound more agressive.
Yeah, I mainly want better sound, but I'd take the ponies if they were available at or around the same price as just bolt ons. But, yer sayin' that nobody makes a slip-on kit fer the busa, that replaces the mid pipes and the cans and leaves the stock head pipe?
This definitely explains why bolt ons don't give more HP tho. They are downstream from a worse restriction...
Either way, until my warrranty is up I ain't gonna change the head pipes. I'm gonna get cans for now. When the warranty is up I will prolly get a full exhaust and do some other stuff, just for fun.