if the calipers are brand new in the box, and say autozone or duralast, maybe try to give them back to autozone for store credit. then buy anything else you need.
scrap the cats then list the spoiler on craigs for 50 bucks and take offers.
if autozone doesnt take the calipers, then list em on craigs as well. some people would rather just buy them for close to the same price and not have to put down an extra 35 a piece in core deposits. but call autozone and see what the part numbers sell for.
2002 GT 5sp. 16x,xxx miles
Steeda Exhaust, C&L plenum, BBK Throttle Body, Steeda Underdrive, Steeda short throw, unknown stage clutch. Rear main leak. Compressor seal leak. Steeda lower control arms. good tires.