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Ships within 48 hours · Estimated delivery Sep 16 - Sep 21
UMI’s adjustable rear upper control arms are a reliable addition to your street car
giving you the versatility to drive to the track and race at the track with the same sway bar
3058-650 - 1978-1988 GM G-Body
5" drop in the rear
high-durometer bushings add a solid
Manley Valve - Exhaust, Valve-S/D 1.900,+.100 Shopify Collective UMI’s adjustable rear upper controlManley Severe Duty Valves deliver the ultimate in strength, reliability, and high performance durability. Engineered for extreme gasoline engine temperatures, these valves are crafted from exclusive materials (XH 428 for exhaust and NK 844 for intake), offering unmatched tensile strength compared to competitive alloys. In fatigue testing at 40,000 psi and 1400F, Manley exhaust valves endured 100 million cycles, while competitors failed after just
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