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I'm building an rb25de engine using an rb26 crank and rods with forged pistons.

I'm going to use arp rod bolts and had intended to replace the headbolts with arp studs.

I spoke to my engine builder today.

Apparently arp don't make rb25 11mm headstuds but he can drill and tap the block for rb26 12mm headstuds.

He wants an extra $300 or so to do this plus the studs, just when I was looking to shave a few dollars off the cost of this project.

Does anyone else make upgrade headbolts or studs for the rb25?

How dodgy would it be to reuse the stock bolts and save $600?

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https://www.sau.com.au/forums/topic/125041-headboltsstuds-upgrade-or-not/
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I was ordering parts today for my RB25 rebuild

When I ordered ARP rodbolts and priced the headstuds the guy reckoned I'd be mad not to do the mainstuds as well.

Keeping in mind I'm on a tight budget I was wondering at what power level you would have trouble reusing the stock main bolts or head bolts for that matter?

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