Yes i am well aware of ARP's existence, so don't just tell me to get those. This is a question of meer curiousity. Just curious if there's a boost / hp range that they usually fail at. Thanks

 

i would also like to know out of curiosity

 

I was able to run about 15psi on stock head studs on F23 for about 1.5k miles then they streached 1/8" across the board . Now using H23 headstuds from ARP.
The car was making around 320 whp

 

well on my setup i am using stock HONDA studs and they are holding and i am pushing 20 psi on a sc61(.70ar) turbo... but if i had the chance to put the arps in i would ..

 

i got close to 3k miles at 9-10 psi now
and no problems on stock bolts......

i would go with ARP next time the head comes off

 

If it's D-series, the head's gonna lift and you'll need a headgasket. Just wait until then to put ARP's on.

Never re-use stock head bolts. Yeah, yeah, their are people who have done it, but why would you go through the trouble of putting on a fresh head-gasket, having your head decked and not buy $100 insurance that you won't have to do it again. That's just the way I look at it. Why spend $50 on a head gasket, if you're not sure if it'll last because your head bolts might be stretched.

 

In our motors for the Pro FWD the H22. We O-Ringed the head. Used stock head bolts and stock head gaskets and have never had a problem. We have boosted over 45+psi on this setup and no problems. Although this may get a little pricey as we replace the bolts everytime the head comes off.

The other thing if you are using studs yes they are re-usable, but make sure after you bolt on the head put the through a few heat cycles and re-torque them. This is important or you will be blowing head gaskets.