Hello, i have some questions about arp or oem headbolts.
I read that oem headbolts is the weakest point, doesent hold up for power above 330-350hp, anyone with experience?
Is the sidewinder block stiff enough for arp bolts?
I know that some alu block (bmw) doesent hold up for the extra...
Can you tell us which extensions that fits the 137”? I have one 2022 thundercat 137 and cant find the right extensions to 146 cause i have the bigger square hole för the idler wheel with wheels on the outside.
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