try caprisport if your on budget they do 260mm disc kit and sierra calipers to fit inside 13's or 280mm in 15's. 2.8 capri stuff not any better than standard there just vented and compbrake stuff is worse calipers made of spongy cheese or something similar on my 2.8 you could actually c the caliper flexing willwoods fitted now miles better and are dust sealed for road