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Tough call -The Bentley manual prescibes 17 ft/lbs torque -which isn't a lot .However,the headers and the converter hang off those bolts ...........
In my case I didn't have enough thread left to salvage -you might .Actually there is an optioin past the helicol - step studs -m10 and m8 . Don't understand why they used bolts -the two 911's I restored had studs and were never a problem ..
Dave
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