Tim...when I had the FAST and tried to install the engine covers, the driver side would not go on and the pass. side did, but sat way above the intake,leaving a very noticable gap, so I took them off instead of trying to cut/modify them.I've seen labor rates for installation of the FAST range from $500 to $1000, depending on the shop. There may be cheaper out there, but thats my experience.I saw a 16.5 RWHP difference with the FAST.Good luck:thumbsup: