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To ensure proper sealing of valve covers
Stainless Steel 45° NPT to AN Adapter
CNC-mach ined from 6061-T6 aircraft aluminum
AF414-06-06BLK
Steel Chrome Finish
Single Head / Main Stud ARAP3.500-1LB EJ20 To ensure proper sealing ofSingle Head Main Stud7 16" Thread X 3. 500" OAL ARAP3. 500 1LB AP3. 500 1LB It is for good reason that virtually every top professional engine builder relies on ARP Pro Series head studs for their all out competition powerplants. Simply stated, there's not a better stud setup on the market today. For openers, ARP only uses premium grade 8740 alloy and a proprietary ARP2000 alloy that are rated far superior to "aircraft" quality alloy steels. Secondly,
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