I need a rear counterweight for my '94 13b-rew. where is the best place to get one? Also does anyone know if there is anyone in the CA bay area that does 3mm apex seal machining?

 

Only reason you need to machine the apex seal slots is if they are out of spec. It's a waste of time and money to get them machined to 3mm if they are in specs. I've seen engines pushed to 30psi boost and over 500rwhp on stock 2mm apex seals it is all about the tuning. http://www.speedmachineperformance.c...l?v=1&pid=3741 counter weight is $119 or find one from an automatic FD same thing.

 

well this engine has had 100k miles with the stock apex seals and the slots are obviously beat open the edges on the rotors are pushed out and the wiggle enough to know that its not a very good fit.