The Shark Racing kit is NOT bolt on by any means, and from those I have talked to the kit had more than a few issues "bolting on" with the parts supplied. Not to mention the kit for 280-290whp is sold with pistons, meaning you'd have to tear apart the motor to do that. Which means it is not bolt on. Besides, Shark Racing's customer service rep has never been good.
Now I will warn you, Alpine has great customer service if you approach them in the correct way. You have a good attitude and they will bend over backwards for you. You may have to wait a little while to get their kit, as they manufacture alot of the parts in S. Africa, but it will be worth the wait. They are good guys.