I have seen that factory head bolts are one time use and must be discarded after being stretched. What about the main cap bolts, same story?

 

I wouldn't reuse any factory torque bolts for the bottom end, IMO.

 

I believe a lot of vehicles use torque to yield bolts. Either way it is cheap insurance to buy new fasteners.

 

Gen I & II SBC main bolts can be re-used...they are not TTY.

 

How can you tell by looking if a bolt is TTY or not?

 

Why would you not want to use APR for every bolt on your whole car? I use APR bolts to hold down my radiator on my 6XX HP Monte Carlo (Before the dual stage 400 shot ) ... lol... I guess thats what hapens when you have money to blow..

 

I have resued them on stock rebuilds but would not on a hi-po buildup.

Rich