hey guys i drive a 2001 Z24 and i just got a new engine put in it and i have noticed problem the idle speed is usually at like 1000RPM but now its like 2000 and it seems to take a while for the RPMS to come back down after shifting sometimes..usually this is when i go to neutral ALSO anybody know a good place to get a performance clutch with the slave cylinder...i want to put a stage 3 or 4 in but am having problems finding the slave cylinder too..or can i buy that separate? thanks guys

Go back and ask the people who you bought it from.

Did it have any warranty?