capt.Ron

Not yet.
I bought it in DEC and have done very little to it. Made my own CAI out of a piece of 4" exhaust and the amsoil 4510 filter and got a Predator tuner for it. I've got a spare throttlebody that I'm going to have ported out from 80mm to 85mm. I'm thinkin about doing exhaust at the same time.
BTW- It's actually the wifes car. Gave it to her as a birthday gift.
Get your wife one......you won't regret it!!!!

capt.Ron

Well I finally got around to installing. After a week of squirting the exhaust bolts with PB blaster those bots zipped right out.
I wrapped the downpipe with 2" header wrap. I took it all the wall to the extension.
Haven't towed anything yet but I am seeing lower EGTs. Spool and throttle response is pretty amazing now as well. I beat the pants off of some "beater" Mustang yesterday on I35 in Fort Worth. Jerk was tieing up the left lane and tried to throttle up to keep me from getting around him.
Less smoke when I hit the throttle too.
I can hear it in the cab but it's not obnoxious.
Oh and I almost got the factory system off without cutting.
The back clamp was crimped down so tight that it bent the pipes into each other. The other couplings separated with just a little wiggling.