{"product_id":"umi-adjustable-uppers-with-roto-joints-cut-wheel-hop-boost-traction","title":"UMI adjustable uppers with Roto-Joints cut wheel hop \u0026 boost traction","description":"For  ease of adjustment UMI has designed our upper control arms with   on car adjustability.  Pinion angle adjustments can easily be made in   the garage or at the track and  making adjustments is as simple as   loosening two jam nuts. Using UMI’s chrome  moly on car adjuster, simply   turn the adjuster with the control arms attached  to the vehicle to   quickly lengthen or shorten the control arm. As the control  arms are   shortened or lengthen the rotate the rear end changing the pinion    angle. Pinion angle adjustments are crucial when wanting to lower your   track 60  foot times, increase traction and reduce unwanted wheel hop.","brand":"UMI Performance","offers":[{"title":"Default Title","offer_id":52905660776742,"sku":"GPHP_3624-R","price":319.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0672\/5697\/5654\/files\/3037a_LRG_73db4711-5cc8-41c4-829d-4c913354338b.jpg?v=1775005365","url":"https:\/\/ossparts.com\/products\/umi-adjustable-uppers-with-roto-joints-cut-wheel-hop-boost-traction","provider":"Operational Speed Supply","version":"1.0","type":"link"}