Hi,
The DA 100 price as advertised is $1150.00 and that does include the IGN. If you were referring to dual (as in 2 IGN.'s) the second one would be extra. There are a few different choices of headers and cans they offer. They offer a solid, flex, and header kit that can be custom made out of pieces to fit your plane...they also offer PEFA and KS canister pipes, as well as "full-wave" (I know, really a misnomer that full-wave stuff) pipes. I wouldn't recommend the full pipes though. The ones I am using personally are the KS 70cc cans and the KS Syainless header kit. I took the pieces and fabricated the headers myself for the plane. The price of that setup is 110.00x2 for the pipes and approximately 50 dollars for the header kit. I can't remember the exact price because I ordered a couple extra pieces to add to the headers to make a special setup for this particular plane. These pipes are on this plane not so much for power, but to quiet it. I am currently using two different props. I have the Mejzlik 28-10 2 blade on there at present and it tachs 6700 rpms and has maybe 2 gallons through it, so that is not representative of what it will turn after it's fully broke-in. I also have the AM 26-12 3 blade but have only bolted it on to see how quiet it was, and it's a whisper prop. I would expect that it would turn what others have told me in the 6100-6200 range. I am also gonna test a MSC 26-10 at the Joe Nall...these props have VERY wide chords to them and load the engine down extremely well for quiet running and tractor-like pulling from the reports I gotten, but I want to try that first to see how it agreees with my flying style. Alot of the guys say the MSC is a really good 3d prop because of the brute pull it has in the verticals and out of hovers...they also state it torque rolls really well. I know that the 3 blade is more of a smooth precision flying prop. The Mej. is just plain ballistic...verticals are effortless, and the plane will accelerate in a vertical like a bottle-rocket....seriously, that's no exageration...the first couple time I shot the power to it I had to come back off it...don't like yanking on it that hard. The power does take some getting used to, but it comes in very handy in the wind. The plane will pill through manuvers slow and easy like the wind wasn't there. You can throttle the plane for smooth slow effortless looking sequences. It really is nice. I have to give credit to these guys who made all this stuff, because i have never flow a plane that flew this good. Not even the pattern planes I used to fly flew like these planes do. It really makes it nice. Well, i hope some of this info. helps you some.