Those are 1.75" on the bike now. Possibly too large for an xb9, but I'll mess with it and see how it runs. I'll be building a few custom sets in 1.88" and 2" sizes for guys that have built motors or are all out race applications. Oddly enough, on the 1125, 2" primaries work pretty good so we shall see how it goes.
Those headers look gorgeous. I've got a small dent in my 12s header and I've been wanting to pull the trigger on a new one but I don't want to settle with a stocker. Wish I could get a header like this.
Posted on Saturday, September 15, 2012 - 11:44 am:
That's him in the pic above, eventually it will be his bike.
I put the sensor bungs where it would be easy access to switch them since the bike currently only has one O2 sensor. I may end up putting a pair of Bosch widebands on it with my PLX devices O2 controllers. Mainly it's just for tuning purposes, where do YOU want them located? There aren't many places to put them and the sensor bungs that I have are flat across both sides, so mounting them in the stock location is not an option. I planned on going to the wideband eventually, so they need to be either on the top or the side of the pipe, bottom mounting is not a good option. I think the narrow band sensors are a little bit more tolerant as far as the mounting position goes.
Also, these are just prototype headers, they will change on the next version. More slip fittings to make it easier to install and allow for variances between bikes.