{"product_id":"umi-5021-b-75-80-gm-h-body-adjustable-panhard-bar-black","title":"UMI Performance 75-80 GM H-Body Single Adjustable Panhard Bar- Rod End","description":"\u003ch4\u003eCenter the Rear Axle and Eliminate Rear-End Wander on Your 1975-1980 GM H-Body with the UMI 5021-B Adjustable Panhard Bar\u003c\/h4\u003e\n\u003cp\u003eThe UMI Performance 5021-B is a single adjustable panhard bar with a precision rod end for the 1975-1980 GM H-Body platform, covering the Chevrolet Monza, Chevrolet Vega, and Pontiac Astre. The factory H-Body panhard bar is a non-adjustable rubber bushing design that allows the rear axle to shift laterally under load and over time loses its ability to keep the axle properly centered in the chassis. This lateral movement results in a wandering rear end, inconsistent corner handling, and excessive body roll.\u003c\/p\u003e\n\u003cp\u003eThe UMI 5021-B replaces the factory unit with an adjustable tubular steel bar featuring a polyurethane bushing on one end and a precision rod end bearing on the other, allowing the rear axle to be precisely centered in the chassis. The rod end bearing eliminates the deflection and compliance inherent in rubber bushing designs, providing a more precise lateral location of the rear axle under all driving conditions. Finished in black powder coat and manufactured in the USA at UMI Performance's Philipsburg, Pennsylvania facility.\u003c\/p\u003e\n\u003ch4\u003eKey Features\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003eSingle adjustable panhard bar allows precise rear axle centering in the 1975-1980 GM H-Body chassis\u003c\/li\u003e\n\u003cli\u003ePrecision rod end bearing eliminates lateral compliance of factory rubber bushing design\u003c\/li\u003e\n\u003cli\u003eAdjustable length corrects axle offset from lowering springs, drop spindles, or suspension modifications\u003c\/li\u003e\n\u003cli\u003eTubular steel construction for rigidity and durability\u003c\/li\u003e\n\u003cli\u003eBlack powder coat finish for corrosion resistance\u003c\/li\u003e\n\u003cli\u003eFits 1975-1980 Chevrolet Monza, Vega, and Pontiac Astre\u003c\/li\u003e\n\u003cli\u003eManufactured in the USA by UMI Performance in Philipsburg, Pennsylvania\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eVehicle Fitment\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eYear Range\u003c\/th\u003e\n\u003cth\u003eMake\u003c\/th\u003e\n\u003cth\u003eModel\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003e1975-1980\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eMonza\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1975-1980\u003c\/td\u003e\n\u003ctd\u003eChevrolet\u003c\/td\u003e\n\u003ctd\u003eVega\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e1975-1980\u003c\/td\u003e\n\u003ctd\u003ePontiac\u003c\/td\u003e\n\u003ctd\u003eAstre\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eSpecifications\u003c\/h4\u003e\n\u003ctable\u003e\n\u003cthead\u003e\n\u003ctr\u003e\n\u003cth\u003eDetail\u003c\/th\u003e\n\u003cth\u003eValue\u003c\/th\u003e\n\u003c\/tr\u003e\n\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003ePart Number\u003c\/td\u003e\n\u003ctd\u003e5021-B\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBrand\u003c\/td\u003e\n\u003ctd\u003eUMI Performance\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eType\u003c\/td\u003e\n\u003ctd\u003eSingle adjustable panhard bar\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eEnd Fittings\u003c\/td\u003e\n\u003ctd\u003ePolyurethane bushing one end, rod end bearing other end\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eMaterial\u003c\/td\u003e\n\u003ctd\u003eTubular steel\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eFinish\u003c\/td\u003e\n\u003ctd\u003eBlack powder coat\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eApplication\u003c\/td\u003e\n\u003ctd\u003e1975-1980 GM H-Body\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eCountry of Manufacture\u003c\/td\u003e\n\u003ctd\u003eUSA\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eUPC\u003c\/td\u003e\n\u003ctd\u003eN\/A\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003ch4\u003eWhat's Included\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e1x UMI Performance 5021-B adjustable panhard bar\u003c\/li\u003e\n\u003cli\u003eHardware for installation\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eAbout UMI Performance\u003c\/h4\u003e\n\u003cp\u003eUMI Performance is an American suspension and chassis manufacturer based in Philipsburg, Pennsylvania, specializing in GM F-Body, G-Body, H-Body, A-Body, and CTS-V performance components. All UMI products are engineered and manufactured in-house for precision fitment in street, autocross, and road race applications.\u003c\/p\u003e\n\u003ch4\u003eRelated Parts on Our Site\u003c\/h4\u003e\n\u003cul\u003e\n\u003cli\u003e\u003ca href=\"\/products\/umi-3030-78-87-gm-g-body-ac-heater-box-delete-panel\"\u003eUMI 3030 1978-1987 GM G-Body AC Heater Box Delete Panel - Firewall panel for the related GM G-Body platform\u003c\/a\u003e\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eFrequently Asked Questions\u003c\/h4\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the UMI Performance 5021-B?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe UMI 5021-B is a single adjustable panhard bar with a rod end for the 1975-1980 GM H-Body Chevrolet Monza, Vega, and Pontiac Astre. It replaces the factory non-adjustable rubber bushing panhard bar to precisely center the rear axle in the chassis, eliminating axle wander and improving rear suspension consistency under cornering loads.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhy do I need an adjustable panhard bar on my H-Body?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe factory H-Body panhard bar is fixed length and uses rubber bushings that allow compliance and lateral movement of the rear axle. If the vehicle has been lowered, has worn bushings, or the rear axle has shifted off-center from the factory position, an adjustable panhard bar like the UMI 5021-B allows the bar length to be set so the axle sits perfectly centered in the chassis. This directly improves rear end stability and cornering balance.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhat is the difference between a single adjustable and double adjustable panhard bar?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eA single adjustable panhard bar adjusts at one end only, allowing the overall length to be set to center the axle but not providing independent control of each end. A double adjustable bar allows both ends to be adjusted, giving more precise control over the bar angle and axle position. For most street and autocross H-Body builds, a single adjustable panhard bar provides adequate adjustment range to center the axle properly.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWill the 5021-B fit my H-Body if I have lowering springs installed?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The adjustability of the UMI 5021-B is specifically valuable on lowered H-Body vehicles, where the change in suspension geometry from lowering springs can shift the rear axle off-center from the factory position. Set the bar length after installation with the vehicle at ride height and the axle visually centered in the chassis and wheel wells.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the rod end require maintenance?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eRod end bearings used in adjustable suspension links benefit from periodic inspection for wear, corrosion, and smooth operation. Inspect the rod end annually or after any hard off-road or track use. Replace the rod end if any lateral play or binding is detected. UMI designs the 5021-B with an appropriately sized rod end for the load demands of the H-Body rear suspension.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eDoes the 5021-B fit the 1971-1977 GM H-Body Vega?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe UMI 5021-B is listed for the 1975-1980 GM H-Body. Confirm fitment for 1971-1974 Vega models with UMI Performance directly, as the earlier H-Body variants may have different rear suspension mounting dimensions.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eIs the 5021-B street legal?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eYes. The UMI 5021-B is a direct replacement for the factory panhard bar and is fully street legal. No emissions-related modifications are involved. The rod end design is appropriate for street driving loads and does not require additional reinforcement for street use.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eWhere is the UMI 5021-B manufactured?\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp\u003eThe UMI 5021-B is manufactured in the USA at UMI Performance's facility in Philipsburg, Pennsylvania.\u003c\/p\u003e\n\u003ch4\u003eInstallation Instructions\u003c\/h4\u003e\n\u003col\u003e\n\u003cli\u003eSafely lift and support the vehicle on jack stands with the rear suspension hanging freely to allow access to the rear axle and panhard bar mounting points.\u003c\/li\u003e\n\u003cli\u003eLocate the factory panhard bar. Note the mounting point on the frame on one end and the rear axle bracket on the other.\u003c\/li\u003e\n\u003cli\u003eRemove the factory panhard bar hardware and set the factory bar aside for reference.\u003c\/li\u003e\n\u003cli\u003eThread the UMI 5021-B to approximately the same length as the factory bar as a starting point.\u003c\/li\u003e\n\u003cli\u003eInstall the rod end end of the 5021-B to the appropriate mounting point (axle or frame per the factory orientation) and the bushing end to the other. Install hardware loosely.\u003c\/li\u003e\n\u003cli\u003eLower the vehicle to ride height with the weight of the vehicle on the suspension.\u003c\/li\u003e\n\u003cli\u003eVisually check the rear axle centering in the wheel wells by measuring from the axle to the wheel well lip on each side. Adjust bar length to center the axle if needed.\u003c\/li\u003e\n\u003cli\u003eOnce centered, torque the mounting hardware to the factory specification for your application. Torque jam nuts on the rod end body.\u003c\/li\u003e\n\u003cli\u003eRecheck centering after torquing. Drive the vehicle and recheck after the first 100 miles as the new bar settles.\u003c\/li\u003e\n\u003c\/ol\u003e\n\u003cp\u003e\u003cstrong\u003eWARNING:\u003c\/strong\u003e This product can expose you to chemicals including lead and phthalates, which are known to the State of California to cause cancer and reproductive harm. For more information go to www.P65Warnings.ca.gov.\u003c\/p\u003e","brand":"UMI Performance","offers":[{"title":"Default Title","offer_id":46055304593487,"sku":"UMI5021-B","price":13800.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/1062\/7920\/files\/umi-5021-b-adjustable-panhard-bar.png?v=1784124102","url":"https:\/\/www.blackopsautoworks.com\/products\/umi-5021-b-75-80-gm-h-body-adjustable-panhard-bar-black","provider":"Black Ops Auto Works","version":"1.0","type":"link"}