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the factory MUA (Multi-Air Unit Actuator) is easily connected to the air intake coupling
which gives them about 1000% (that's ten times) better fatigue strength than those studs that are threaded prior to heat-treat (a very common industry practice)
AMS developed the Alpha Performance Porsche 991
AVOTurboworld designed its inlet pipe with two goals in mind
Invidia N1 Exhaust Systems are also designed for the most aggressive looks
ARP Cylinder Head Stud Kit Engine Bottom End Internals the factory MUA (Multi-Air UnitIt 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 uses a premium grade 8740 alloy that is rated far superior to "aircraft" quality. Then, each stud is placed vertically in special racks and precisely heat treated to 200,000 psi. This procedure ensures complete heat
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