Tell them the real reason! you need money for foood!!
But seriously guys.. This is a great deal. Brand new these things cost 620 + a 400 dollar core charge, so if you want to have an extra turbo laying around for warranty reasons or anything, you're saving almost 300 bucks going with this one. OR you can buy this, and sell your stock turbo for about 250-300 fast and easy and get an upgraded turbo for only 450-500 bucks after you sell your turbo! Awesome deal
has a larger compressor wheel, clipped turbine, port and polish. basically it will flow more air, more efficiently (more power). at the expense of a slightly slower spool time (from clipping the turbine)
There's a guy who put down 347whp/360wtq with this turbo at 20 psi. He posted info on other forums, but pretty sure I'm not allowed to post links to them... if you want to see his post and dynos PM me!