the stock boot will not work, the outlet/inlet tubes of the spearco are smaller. the spearco tubes have the 45 degree angle built into the tubes. they might work if you find a 45 and/or 90 degree boots and modify to fit.
The spearco's are 3" in and out and are flush to the back edge of the intercooler. I like mine but hated the new tubing set up for fit and didn't care for the 2 ply boots. The tubes are polished stainless not chrome. I welded the spearco's to an existing tube for the pipe I wanted. Worked sweet in the end.