Yea I'm sure you can get a better price with those guys because it's already set up for a SHO. I've been looking into the Xcal 4 seems like a good option from what I've been reading they seem to have worked out the bugs. As for tuners I'm leaning words Lund racing. A friend of mine has a 13 with...
I'm afraid you can't I looked into it and they are not compatible.. Good thing for you it's an unlocked tuner and you can sell it for some money. Seen them go for 150.00 on other forums.
Without a tune you will get a cel with long tube headers with or without cats. Your stock tune is looking for a signal from the O2 sensors at a their stock location and rate of cycle. When you install long tube headers you move the O2 sensors. The upstream sensors stay close to their stock...
do to heat cycling the clamps have expanded a little bit. They should seal if you tighten them down again. Since yours continue to come loose you can remove it apply some red lock tight to the bolt and tighten it down again or you could get a get similar exhaust clamps from aftermarket suppliers...
Good luck with roush and their warty department. Had a 2010 427r that had issues running lean with their tune and they told me it couldn't be their tune and it must have been something I had done to the car. Mind you the car at the time was completely stock as it came from the dealership.
RPI is selling these spoilers painted for around 225.00 more then retail. I'm going to go this rout since every body shop in my area wants a ridiculous amount to paint a spoiler.
The 1/2 inch bottle neck isn't going to hurt your power gains unless you are way up there I the horsepower range. I like kooks headers myself but there are lots of good rands out there that will work with your set up.