For goodness Sake mate......
1st unless you live next to a race track don't even think about 'performance'
cams
2nd make sure once fitted, you 'run in' the cam ie,- start it up
and do NOT let the engine idle, keep the revs at at least 2000 revs
for a minimum of 30 mins if it starts to overheat turn it off let it cool
and start again until you've completed the 30 mins.
The Dr