FWIW, I've been running these studs for 10+ years and have never heard of this as an issue, nor am I aware of any of the ARP 22R-series studs being tapered.

Not disagreeing with Todd, whose seen more motors than I have, or with anyone who has starved a motor and feels this is the cause, but I can state with confidence that this has never been an issue for me.

I will also say that ARP has a fantastic technical support line, so you may want to give them a call and ask them directly if any of their 22R-series studs are tapered.

-Jeff


Jeff Moskovitz
1986 turbo 4X4 truck
1998 2.7L/M5 4X4 4Runner

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