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Ships within 48 hours · Estimated delivery Oct 17 - Oct 22
ARP Head Stud Kit, BMW S85 S58B30 Alpina XB7 Series Piston Size:85.5 mm Bore Alpina XB7 Series each valve undergoes a 48 hour heat treatment and stress relief process to ensure molecular integrity and consistent performance Chase if necessary with ARP Thread Chaser then re torque your head studs to spec
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