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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
it is still not the most effective way to boost performance
and removing as much restriction as possible is the best way to improve efficiency
+35 HP / +31 lbs
and changes in handling characteristics of your MINI
ARP Custom Age 625+ Cylinder Head Stud Kit Turbo Headers/Manifolds It is for good reasonCUSTOM AGE 625 PLUS: This newly formulated super alloy demonstrates superior fatigue cycle life, tensile strength and toughness with complete resistance to atmospheric corrosion and oxidation. ARP is the first to develop manufacturing and testing processes for fasteners with Custom Age 625+. Best of all it is less expensive and expected to soon replace MP 35 as the material of choice in the high strength, super alloy field. Typical tensile strength is
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