housings that extend past the flapper door for the wastegate (per Garrett). The concern is the condition of the exhaust housings, and that the cracks don't extend much past the wastegate bore. It's easy to check...clean up that area in the exhaust housing (near the flapper door) and see if there are any cracks that extend past the flapper door. If not ( or just slightly past), the housings are acceptable for a sport 500 set up. Hope that helps, Mark