I can't believe you guys replace those plastic spoiler clips. No matter the cost, you can reuse the old ones. Just take a punch and hammer and tap out the inner piece. You'll hear it drop but, once the black part off the spoiler, shake it around and all 3 pins will fall out. Then you just put the plastic clip back in and tap the pin in the center.
I just put the Stebro Race exhaust on my car this week. Removing the bumper was no problem at all, I do it on a daily basis though. The toughest part was removing the rusted bolts holding the u-pipes on. All and all, said and done was about 7 hours. It's the first time I've done anything like this so, I don't think that's too long. Would I have paid a shop to do it...NO, I would've missed out on the satisfaction I got on my first drive.
Oh btw, the Race exhaust is LOUD with alot of resonance. If that bothers you, steer clear...I LOVE it though.