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All kits include zinc plated grade 8 ubolts. \u003c\/p\u003e\n\u003ch3\u003eVideo: How To Install Rear Lowering Blocks\u003c\/h3\u003e\n\u003cdiv class=\"video-container\"\u003e\u003ciframe width=\"560\" height=\"315\" src=\"https:\/\/www.youtube.com\/embed\/QGsSfvjmkrg\"\u003e\u003c\/iframe\u003e\u003c\/div\u003e","brand":"Performance Online (POL)","offers":[{"title":"1\" drop","offer_id":44023272865826,"sku":"PO2031","price":47.29,"currency_code":"USD","in_stock":true},{"title":"2\" drop","offer_id":44023272898594,"sku":"PO2032","price":55.58,"currency_code":"USD","in_stock":true},{"title":"3\" drop","offer_id":44023272931362,"sku":"PO2033","price":63.83,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0811\/7642\/8578\/files\/POL203_250W.jpg?v=1787491088"},{"product_id":"sway-bar-frame-bushing-set-poly-urethane","title":"Sway Bar Frame Bushing Set, Poly Urethane","description":"\u003cp\u003eSway bar frame bushings fit up to 1.00\" sway bar diameters. \u003c\/p\u003e \n \n\u003cp\u003e\u003cstrong\u003eDetails: \u003c\/strong\u003e\u003c\/p\u003e \n \n\u003cul\u003e \n\t\u003cli\u003eA must when rebuilding your front end.\u003c\/li\u003e \n\t\u003cli\u003eAllows suspension to work positively 100% of the time, giving the driver that \"in control\" feeling.\u003c\/li\u003e \n\t\u003cli\u003eHelps maintain proper suspension geometry and improved vehicle handling.\u003c\/li\u003e \n\t\u003cli\u003ePoly Urethane kits include graphite to eliminate squeaking.\u003c\/li\u003e \n\t\u003cli\u003eSpecify sway bar diameter when ordering.\u003c\/li\u003e \n\u003c\/ul\u003e \n","brand":"Prothane","offers":[{"title":"7\/16\"","offer_id":44023278403618,"sku":"19-1101A","price":14.89,"currency_code":"USD","in_stock":true},{"title":"1\/2\"","offer_id":44023278436386,"sku":"19-1102A","price":15.35,"currency_code":"USD","in_stock":true},{"title":"9\/16\"","offer_id":44023278469154,"sku":"19-1103A","price":14.81,"currency_code":"USD","in_stock":true},{"title":"5\/8\"","offer_id":44023278501922,"sku":"19-1104A","price":14.81,"currency_code":"USD","in_stock":true},{"title":"11\/16\"","offer_id":44023278534690,"sku":"19-1105A","price":14.81,"currency_code":"USD","in_stock":true},{"title":"3\/4\"","offer_id":44023278567458,"sku":"19-1106A","price":14.29,"currency_code":"USD","in_stock":true},{"title":"13\/16\"","offer_id":44023278600226,"sku":"19-1107A","price":14.29,"currency_code":"USD","in_stock":true},{"title":"7\/8\"","offer_id":44023278632994,"sku":"19-1108A","price":13.76,"currency_code":"USD","in_stock":true},{"title":"15\/16\"","offer_id":44023278665762,"sku":"19-1109A","price":13.49,"currency_code":"USD","in_stock":true},{"title":"1\"","offer_id":44023278698530,"sku":"19-1110A","price":12.96,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0811\/7642\/8578\/files\/Screenshot2026-07-23133401.png?v=1787491030"},{"product_id":"sway-bar-end-link-set-poly-urethane","title":"Sway Bar End Link Set, Poly Urethane","description":"\u003cp\u003eReplace your old worn sway bar end links with these high quality items.\u003cbr\u003e\u003cbr\u003eAvailable in Poly Urethane which includes graphite to eliminate squeaking. Check \"A\" length when ordering, see options.\u003c\/p\u003e","brand":"Prothane","offers":[{"title":"4 5\/8\" (19-424)","offer_id":44023278960674,"sku":"19-424","price":30.78,"currency_code":"USD","in_stock":true},{"title":"2 3\/4\" (19-421)","offer_id":44023278993442,"sku":"19-421","price":24.81,"currency_code":"USD","in_stock":true},{"title":"1 3\/8\" (19-420)","offer_id":44023279026210,"sku":"19-420","price":19.84,"currency_code":"USD","in_stock":true},{"title":"7 3\/8\" (19-419)","offer_id":44023279058978,"sku":"19-419","price":42.13,"currency_code":"USD","in_stock":true},{"title":"6 1\/8\" (19-417)","offer_id":44023279091746,"sku":"19-417","price":25.38,"currency_code":"USD","in_stock":true},{"title":"5\" (19-416)","offer_id":44023279124514,"sku":"19-416","price":25.87,"currency_code":"USD","in_stock":true},{"title":"5 3\/8\" (19-413)","offer_id":44023279157282,"sku":"19-413","price":34.17,"currency_code":"USD","in_stock":true},{"title":"4 3\/4\" (19-412)","offer_id":44023279190050,"sku":"19-412","price":25.87,"currency_code":"USD","in_stock":true},{"title":"4 1\/2\" (19-409)","offer_id":44023279222818,"sku":"19-409","price":28.2,"currency_code":"USD","in_stock":true},{"title":"4 1\/4\" (19-408)","offer_id":44023279255586,"sku":"19-408","price":28.15,"currency_code":"USD","in_stock":true},{"title":"3 1\/2\" (19-406)","offer_id":44023279288354,"sku":"19-406","price":26.68,"currency_code":"USD","in_stock":true},{"title":"3 1\/4\" (19-405)","offer_id":44023279321122,"sku":"19-405","price":25.41,"currency_code":"USD","in_stock":true},{"title":"3 3\/4\" (19-404)","offer_id":44023279353890,"sku":"19-404","price":27.63,"currency_code":"USD","in_stock":true},{"title":"2 5\/8\" (19-403)","offer_id":44023279386658,"sku":"19-403","price":24.23,"currency_code":"USD","in_stock":true},{"title":"3\" (19-402)","offer_id":44023279419426,"sku":"19-402","price":25.44,"currency_code":"USD","in_stock":true},{"title":"2 3\/8\" (19-401)","offer_id":44023279452194,"sku":"19-401","price":25.27,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0811\/7642\/8578\/files\/Screenshot2026-07-23132903.png?v=1787491030"},{"product_id":"heidts-1967-70-mercury-cougar-i-f-s-suspension-system-mustang-2-type","title":"Heidts - 1967-70 Mercury Cougar I.F.S. 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The overlap extends over the high stress area of the spring emulating a parabolic type spring.\u003c\/p\u003e \n \n\u003cul\u003e \n\t\u003cli\u003e Energy Suspension poly urethane bushings supplied for rear eyes.\u003c\/li\u003e \n\t\u003cli\u003e Split-Mono leaf springs made to work in conjunction with our traction bars.\u003c\/li\u003e \n\t\u003cli\u003e 200lb. - 225lb. Spring Rate\u003c\/li\u003e \n\t\u003cli\u003e Ride height options are stock and 1\" lowered.\u003c\/li\u003e \n\t\u003cli\u003e Substantially lighter than multi-leafs for unsprung weight savings.\u003c\/li\u003e \n\t\u003cli\u003e Heavy duty alignment spring pins \u0026amp; clamps.\\\u003c\/li\u003e \n\t\u003cli\u003e Due to the nature of these springs, requires center bolt modifications \u0026amp; grinding to fit.\u003c\/li\u003e \n\u003c\/ul\u003e \n \n\u003cp\u003e\u003cbr\u003e \n\u003cstrong\u003eTESTED\u003c\/strong\u003e:  These have been proven to withstand over 1200 HP and quarter mile ET's in the low 9's!\u003c\/p\u003e \n \n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eCal Trac Traction Bar Kit\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e \n \n\u003cp\u003eThe combination of these components change the pushing point on the car by redirecting the turning action (spring wrap-up) of the rear axle through the #2 Force Transfer Link into the #1 Front Pivot. (See detailed image below). The Front Pivot Spring Stop resists this turning motion and also controls the bending of the leaf spring at it's thinnest section. The push into the Front Pivot helps the cars weight shift towards the rear of the car, because of new directed angle of force toward the front of the vehicle. (The 'Instant Center' moves further forward). This is where the system emulates a Four link system. The pinion angle is also maintained.\u003c\/p\u003e \n \n\u003cp\u003e\u003cu\u003e\u003cstrong\u003eCalvert Racing CF Series 90\/10 Front Drag Race Shocks\u003c\/strong\u003e\u003c\/u\u003e\u003c\/p\u003e \n \n\u003cul\u003e \n\t\u003cli\u003e\u003cstrong\u003eManufactured to perform right out of the box. \u003c\/strong\u003e\u003c\/li\u003e \n\t\u003cli\u003e\u003cstrong\u003eFastest rate of separation over any other shock on the market today.  \u003c\/strong\u003e\u003c\/li\u003e \n\t\u003cli\u003e\u003cstrong\u003eDual Stage Compression Valving - High speed compression valving will keep the front end from bottoming out on hard landings\u003c\/strong\u003e\u003c\/li\u003e \n\t\u003cli\u003e\u003cstrong\u003eAbsorbs hard hits \u0026amp; settles on the top end\u003c\/strong\u003e\u003c\/li\u003e \n\t\u003cli\u003e\u003cstrong\u003eLight weight design\u003c\/strong\u003e\u003c\/li\u003e \n\u003c\/ul\u003e \n \n\u003cp\u003e\u003cstrong\u003e\u003cu\u003eCalvert Racing CR Series 9 Way Adjustable Rear Shocks\u003c\/u\u003e\u003c\/strong\u003e\u003c\/p\u003e \n \n\u003cul\u003e \n\t\u003cli\u003e\u003cstrong\u003e9-way adjustable\u003c\/strong\u003e\u003c\/li\u003e \n\t\u003cli\u003e\u003cstrong\u003eExternal dial for easy adjust ability\u003c\/strong\u003e\u003c\/li\u003e \n\t\u003cli\u003e\u003cstrong\u003eDial primarily adjusts rebound enabling driver to control rear body separation\u003c\/strong\u003e\u003c\/li\u003e \n\t\u003cli\u003e\u003cstrong\u003eHeavy duty industrial steel bodied design\u003c\/strong\u003e\u003c\/li\u003e \n\t\u003cli\u003e\u003cstrong\u003eGreat for street\/strip use\u003c\/strong\u003e\u003c\/li\u003e \n\u003c\/ul\u003e \n \n\u003cp\u003eProduct fits: 1967 68 69 70 71 72 73 Mercury Cougar\u003c\/p\u003e \n","brand":"Caltracs","offers":[{"title":"Stock","offer_id":44023637508130,"sku":"DP6773CS","price":1414.12,"currency_code":"USD","in_stock":true},{"title":"1\" Lowered","offer_id":44023637540898,"sku":"DP6773CD","price":1414.12,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0811\/7642\/8578\/files\/Drag_20Pack-11.jpg?v=1784711489"},{"product_id":"1960-71-mercury-comet-cyclone-cal-tracs-traction-bar-system","title":"1960-71 Mercury Comet, Cyclone Cal Tracs Traction Bar System","description":"\u003cp\u003eTremendous benefits can be realized when our Cal-Trac traction bar system is installed on a leaf spring suspended 1960-71 Mercury Comet \u0026amp; Cyclone. Traction bars were developed to achieve specific goals to improve high power traction while staying within hard set NHRA parameters. The combination of these components change the pushing point on the car by redirecting the turning action (spring wrap-up) of the rear axle through the #2 Force Transfer Link into the #1 Front Pivot. (See detailed image). The front pivot spring stop resists this turning motion and also controls the bending of the leaf spring at it's thinnest section. The push into the Front Pivot helps the cars weight shift towards the rear of the car, because of new directed angle of force toward the front of the vehicle. (The 'Instant Center' moves further forward). This is where the system emulates a Four link system.\u003c\/p\u003e \n","brand":"Caltracs","offers":[{"title":"1966-71","offer_id":44023648026658,"sku":"TBK6671M","price":417.99,"currency_code":"USD","in_stock":true},{"title":"1960-65","offer_id":44023648059426,"sku":"TBK6065","price":395.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0811\/7642\/8578\/files\/TBK0000_600W-AoCvpI_1fe26547-e3e0-4173-a057-d7cf7963f4de.png?v=1784711425"},{"product_id":"1960-71-mercury-cougar-cal-tracs-traction-bar-system","title":"1967-73 Mercury Cougar Traction Bar Kit, Stock","description":"1967-73 Mercury Cougar Cal Tracs Traction Bar System, Stock Height\nTie Plates w\/Shock mounts\nTraction Bars\nFront Pivot and Bushings\nBlack Powder Coating\nHardware","brand":"Caltracs","offers":[{"title":"Default Title","offer_id":44023648124962,"sku":"TBK6773","price":395.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0811\/7642\/8578\/files\/TBK0000_600W-AoCvpI_516f6efa-2561-41e5-8e37-a2d5c0051318.png?v=1784711425"},{"product_id":"1960-73-ford-and-mercury-rear-9-way-adjustable-drag-shocks-pr","title":"1960-73 Ford and Mercury Calvert Rear Shock","description":"1960-73 Ford and Mercury Rear 9-Way Adjustable Drag Shocks Pr.\n9-Way Adjustable\nExternal dial for easy adjust ability\nDial primarily adjusts rebound, enabling driver to control rear body separation\nHeavy duty industrial steel bodied design\nGreat for street\/strip use\nSold as a Pair\nProduct fits: 1960-73 Ford and Mercury car","brand":"Caltracs","offers":[{"title":"Default Title","offer_id":44023657660450,"sku":"CR44130C","price":295.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0811\/7642\/8578\/files\/9-Way_20Calvert_20Rear_20Shocks_s-01.jpg?v=1784711371"},{"product_id":"1960-67-mercury-comet-rear-split-mono-leaf-springs","title":"1960-67 Mercury Comet Rear Split Mono Leaf Springs","description":"\u003cp\u003e\u003cstrong\u003eOur 1960-67 Mercury Comet and Cyclone Split-Mono leaf springs are complete with solid aluminum bushings in the front eyes and poly-urethane bushings in the rear eyes for minimal deflection. The Split-Mono leaf spring overlaps 12\", extending 6\" on each side of the axle tube. The overlap extends over the high stress area of the spring emulating a parabolic type spring.\u003cbr\u003e \n\u003cbr\u003e \n• Split-Mono leaf springs made to work in conjuction with our traction bars.\u003cbr\u003e \n\u003cbr\u003e \n• 200lb. - 225lb. 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Heidts","description":"\u003cp\u003eHEIDTS 1960-65 FALCON \/ 1964-65 COMET IFS CROSSMEMBER\u003c\/p\u003e\n\u003ctable style=\"border-collapse: collapse; width: 277pt;\" width=\"369\" cellspacing=\"0\" cellpadding=\"0\" border=\"0\"\u003e\n\u003ccolgroup\u003e\n\u003ccol style=\"width: 277pt;\" width=\"369\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr style=\"height: 30.0pt;\" height=\"40\"\u003e\n\u003ctd style=\"height: 30.0pt; width: 277pt;\" width=\"369\" class=\"xl74\" height=\"40\"\u003e1960-1965 Falcon Mustang II complete kit. Complete hub to hub kit\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","brand":"Heidts","offers":[{"title":"Default Title","offer_id":44443279523874,"sku":"PX-330-E-K","price":2700.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0811\/7642\/8578\/files\/null_img_2eddaa62-37d6-484b-ae7b-1da73c91a026.jpg?v=1761341822"}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0811\/7642\/8578\/collections\/Mercury_Cougar_Coupe_1967-5364263.jpg?v=1784696277","url":"https:\/\/www.performanceonline.com\/collections\/1960-73-mercury-cougar-comet-cyclone.oembed?page=2","provider":"Performance Online","version":"1.0","type":"link"}