"Everything is 100% direct bolton. Youll need a set of front and rear 5lug hubs from a NON-TURBO Delta (5Lug Ion, G5GT, SS/2.4, SS/SC, any non-turbop HHR) Only thing to worry about when it comes to hubs is top be sure you dont get hubs from an LNF powered vehicle, and if you have ABS make sure you get ABS hubs. the only non-abs 5lug Delta is the base HHR so that shouldnt be a real issue. nonABS hubs can be as low as $100 ea new in the aftermarket, ABS ones can run as high as $300 each, shop around, used ones should be about $200 for all 4, or less if you shop around.
Youll need rear drums which are about $75ea from GM online, which is actually CHEAPER than what I found in the aftermarket. Youll need a set of front brakes, rotors are like $80ea from NAPA, or damn near every vendor we have sells them.....Youll need a complete set of front calipers, these are available from the aftermarket OR ACDelco for about $200-250 for the set depending on core charge(which you have to pay since you have no cores ) you want "loaded" calipers because they come with everything you need. Or of course you can go used, Ive seen salvage yard calipers for as little as $25ea, some elbow grease and spray paint and theyll be better than new.(I didnt bother painting mine...yet)"