{"product_id":"bmw-3-series-e30-e36-e46-z3-z4-e85-complete-rear-upper-85a-polyurethane-shock-mounting-kit-10mm-1986-2008","title":"BMW 3 Series E30 E36 E46 \/ Z3 \/ Z4 E85 Complete Rear Upper 85A Polyurethane Shock Mounting Kit 10mm 1986 - 2008","description":"\u003cp\u003e\nThe metal plates on top of the E30, E36, E46, Z3, and Z4 rear shock towers share a well-documented weakness — the factory metal is prone to tearing over time, particularly under strong impacts or on vehicles with uprated suspension. This complete rear upper shock mounting kit addresses both the structural and performance shortfalls of the factory setup in a single installation. The 3mm high-strength steel reinforcement plates prevent tearing at the shock tower, while the 85A polyurethane bushings eliminate the deflection that causes vague rear damping, rear end knocking, and loss of shock absorber positioning under load. A low NVH impact design makes this kit equally suitable for daily driven street cars and modified performance builds running uprated shock valving and coilover systems.\n\u003c\/p\u003e\n\n\u003ch6\u003eFeatures:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003e3mm high-strength steel reinforcement plates prevent rear shock tower metal from tearing under sustained impact and load\u003c\/li\u003e\n\u003cli\u003e85A polyurethane bushings eliminate factory shock mount deflection under load – keeping the rear shock absorber correctly positioned for proper damping operation\u003c\/li\u003e\n\u003cli\u003eLow NVH impact design – performance improvement without excessive harshness for street-driven applications\u003c\/li\u003e\n\u003cli\u003ePolyurethane offers lower compression variability, high stability, shock and ageing resistance compared to standard rubber\u003c\/li\u003e\n\u003cli\u003eEliminates rear end knocking caused by worn or degraded factory rubber shock mount bushings\u003c\/li\u003e\n\u003cli\u003e10mm inner sleeve diameter – compatible with OE and a wide range of aftermarket coilover systems\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eSpecifications:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eCondition: 100% Brand New\u003c\/li\u003e\n\u003cli\u003eType: Complete Rear Upper Shock Mounting Kit\u003c\/li\u003e\n\u003cli\u003eMaterial: High-Strength Steel · Polyurethane · Aluminum\u003c\/li\u003e\n\u003cli\u003eReinforcement Plate Thickness: 3mm\u003c\/li\u003e\n\u003cli\u003eBushing Hardness: 85A Shore\u003c\/li\u003e\n\u003cli\u003eShock Shaft Diameter: 10mm\u003c\/li\u003e\n\u003cli\u003eNVH Impact: Low\u003c\/li\u003e\n\u003cli\u003eRecommended Use: Street \u0026amp; Modified Performance\u003c\/li\u003e\n\u003cli\u003eOEM Replacement Part Numbers: 33521092362 · 33521137972 · 33521128734 · 33521128819 · 33526772864 · 33521125554 · 33521123351 · 33526779670 · 37121133412\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eFitment:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eBMW 3 Series E30 318 · 323 · 325 (1986–1991)\u003c\/li\u003e\n\u003cli\u003eBMW 3 Series E36 323 · 325 · 328 · M3 (1992–1999)\u003c\/li\u003e\n\u003cli\u003eBMW 3 Series E46 323 · 325 · 328 · 330 · M3 (1999–2006) – excluding convertible\u003c\/li\u003e\n\u003cli\u003eBMW Z3 E36\/8 2.0 · 2.3 · 2.5 · 3.0L (1996–2003)\u003c\/li\u003e\n\u003cli\u003eBMW Z4 E85 2.5 · 3.0L (2003–2008) – excluding convertible\u003c\/li\u003e\n\u003cli\u003eNot compatible with BMW E36 \/ E46 318ti or convertible body styles\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eShock Absorber Compatibility (10mm):\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eOE standard shocks\u003c\/li\u003e\n\u003cli\u003eBilstein PSS9 \/ PSS10\u003c\/li\u003e\n\u003cli\u003eH\u0026amp;R Coilovers\u003c\/li\u003e\n\u003cli\u003eFK Coilovers\u003c\/li\u003e\n\u003cli\u003eRaceland Coilovers\u003c\/li\u003e\n\u003cli\u003eST Coilovers\u003c\/li\u003e\n\u003cli\u003eKW V1 · V2 · V3\u003c\/li\u003e\n\u003cli\u003eKoni Sport \/ Dinan\u003c\/li\u003e\n\u003cli\u003eAST 4XXX \/ 5XXX Series\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eContents:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003e1x Pair Complete Rear Upper Shock Mounting Kit\u003c\/li\u003e\n\u003cli\u003e3mm High-Strength Steel Reinforcement Plates included\u003c\/li\u003e\n\u003cli\u003e85A Polyurethane Bushings included\u003c\/li\u003e\n\u003cli\u003eAll necessary mounting hardware included\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eBenefits:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eProvides comprehensive protection against the well-known rear shock tower tearing weakness on these platforms\u003c\/li\u003e\n\u003cli\u003eEliminates rear shock mount deflection and rear end knocking in a single kit installation\u003c\/li\u003e\n\u003cli\u003eLow NVH increase makes this a practical upgrade for daily driven and street-oriented builds\u003c\/li\u003e\n\u003cli\u003eMost beneficial on modified suspensions with uprated shock valving where factory mount deflection is most pronounced\u003c\/li\u003e\n\u003cli\u003eComplete kit removes the need to source reinforcement plates and bushings separately\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eInstallation Notes:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003eThe 10mm sizing refers to the inner diameter of the shock mount sleeve – measure the OD of the top threaded portion of your shock absorber before ordering to confirm correct fitment\u003c\/li\u003e\n\u003cli\u003eOE shock shaft diameter is 10mm – aftermarket shocks vary and must be measured individually\u003c\/li\u003e\n\u003cli\u003eFor 12mm shock shaft applications (Tein, MCS, JRZ, Ohlins, TC Kline S\/A or D\/A) a 12mm variant is required – this listing is 10mm only\u003c\/li\u003e\n\u003cli\u003eE30 M3 fitment note: factory seam sealant around the rear shock mounting area may prevent the reinforcement plate from sitting completely flat – minor plate modification may be required to accommodate manufacturing tolerances on this specific model\u003c\/li\u003e\n\u003cli\u003eNot compatible with BMW E36 \/ E46 318ti or any convertible body styles\u003c\/li\u003e\n\u003cli\u003eIf unsure about your shock shaft diameter, contact our team or verify directly with your shock absorber manufacturer before ordering\u003c\/li\u003e\n\u003c\/ul\u003e\n\n\u003ch6\u003eWarranty:\u003c\/h6\u003e\n\u003cul\u003e\n\u003cli\u003e12-month standard warranty from date of purchase\u003c\/li\u003e\n\u003cli\u003eContact our support team for assistance with any issues\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"K2 Industries","offers":[{"title":"Reinforcements","offer_id":48609799110839,"sku":"1005009563048310-Reinforcements","price":39.99,"currency_code":"USD","in_stock":true},{"title":"Black Mounts","offer_id":48609799143607,"sku":"1005009563048310-Black Mounts","price":99.99,"currency_code":"USD","in_stock":false},{"title":"Red Mounts","offer_id":48609799176375,"sku":"1005009563048310-Red Mounts","price":99.99,"currency_code":"USD","in_stock":false},{"title":"1 Black set","offer_id":48609799209143,"sku":"1005009563048310-1 Black set","price":119.99,"currency_code":"USD","in_stock":false}],"url":"https:\/\/milkymotorsports.com\/products\/bmw-3-series-e30-e36-e46-z3-z4-e85-complete-rear-upper-85a-polyurethane-shock-mounting-kit-10mm-1986-2008","provider":"Milky Motorsports","version":"1.0","type":"link"}