i am going to do my timing belt on my 2001 wrx its done 85000 miles
it had a belt on in november 06 at 50000 miles
standard BHP at the moment but have STI intercooler exhaust stystem and going for remap.

do i just do the belt or should i buy the kit with the rollers and tensioner?



How do i tell if it needs roller and tensioner and are they prone to wearing/failure?

 

Do the kit mate. Not worth the risk just doing the belt imo.

 

+1
Its cheaper than bent valves.
While its apart you could do the waterpump too.
Peace of mind is priceless.