Are Screamin' Eagle Part Number: 80518-07 Slip-Ons stage 1?

[G-dizzle]

I have a 2010 xl1200c with Screamin' Eagle Slip-Ons. The Part Number for the rear is 80518-07, the part number for the front is 80599-07. I'm trying to figure out if they are stage 1. The new ones on the Harley site are Part Number: 80503-07. The bike has the stock air cleaner & filter.
Any help is greatly appreciated.

[G-dizzle]

Derr! sorry, I figured it out. The part number on the Harley site (80503-07) is for the pair and they ARE stage 1. thanks anyway.

[Melnic]

I have same pipes on my 2007 and one questions I have for you is does yours misfire some when you are letting up on the throttle and going down a hill in a lower gear? I hate how mine sounds as if the engine is not running right. Don't know if that is typical/normal. This is my first sportster and it was used and came with the SE slip ons.

[aswracing]

See the test on those slip-ons here: http://www.hammerperf.com/ttxlexhaust.shtml#sespslipons

[G-dizzle]

Thanks aswracing. That helps a lot. Do you think i could remove the baffles to increase the air flow preventing it from dying early and level out a little higher?

[aswracing]

Originally Posted by G-dizzle

Thanks aswracing. That helps a lot. Do you think i could remove the baffles to increase the air flow preventing it from dying early and level out a little higher?

Exhaust design is pretty complicated. There's a lot more to it than just pumping losses from restriction. For example, pressure wave travel has an enormous effect. So a simple change like what you're describing may help in one way and yet hurt in another.

Bottom line, I hate to speculate on what effect any given change might make. The dyno has a way of making me look really foolish when I do that.

[G-dizzle]

Thanks again, i spoke to the service tech at Boswells Harley dealer and he said basically the same thing so I'm just gonna leave them alone.