{"title":"Z4 M (E85 \/ E86, S54)","description":"\u003cp\u003eParts for the BMW Z4 M Coupe and M Roadster, E85 \/ E86 chassis, S54 engine.\u003c\/p\u003e","products":[{"product_id":"h-r-sport-spring-kit-for-e85-bmw-z4-m-coupe-m-roadster-2006-2009","title":"H\u0026R Sport Spring Kit – BMW Z4 M Coupe \/ M Roadster (E85)","description":"\u003cstyle\u003e.sl-desc h2{font-size:1.15em;letter-spacing:.06em;text-transform:uppercase;border-bottom:2px solid #111;padding-bottom:6px;margin:1.6em 0 .7em}.sl-desc h3{font-size:1em;margin:1.2em 0 .4em}.sl-desc ul{margin:0 0 1em 1.2em}.sl-desc li{margin:.25em 0}.va-table{width:100%;border-collapse:collapse;margin:.5em 0 1em;font-size:.95em}.va-table th{text-align:left;padding:10px 8px;border-bottom:2px solid #333;white-space:nowrap}.va-table td{padding:8px;border-bottom:1px solid #e5e5e5;vertical-align:top}.sl-note{font-size:.9em;color:#555;margin:.4em 0 1em}\u003c\/style\u003e\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eH\u0026amp;R Sport Springs are the best-selling performance street springs for BMW, and replacing the factory springs is one of the first and most effective steps in suspension tuning. On the E85 Z4 M Roadster and E86 Z4 M Coupe they lower the car roughly an inch at both axles, which drops the center of gravity, reduces body roll and tightens up the fender gap for a more aggressive but still driveway-friendly stance.\u003c\/p\u003e\n\u003cp\u003eThe progressive spring rates are increased 10–20% over stock. They stay compliant during normal driving and stiffen as they compress, so the chassis stays composed when the road gets twisty without punishing the car on rough surfaces.\u003c\/p\u003e\n\u003cp\u003eH\u0026amp;R springs are crafted from a special 54SiCr6 spring steel and shot-peened to increase their life by more than 200%, so they will not settle or sag. All production is completed by H\u0026amp;R in-house, and every spring is 100% tested before leaving the ISO9001-certified production facility in Germany.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApproximate front lowering: 1.0\"\u003c\/li\u003e\n\u003cli\u003eApproximate rear lowering: 1.0\"\u003c\/li\u003e\n\u003cli\u003eProgressive spring rate, increased 10–20% over stock\u003c\/li\u003e\n\u003cli\u003eCrafted from special 54SiCr6 spring steel\u003c\/li\u003e\n\u003cli\u003eShot-peened to increase spring life by more than 200%\u003c\/li\u003e\n\u003cli\u003eWill not settle or sag\u003c\/li\u003e\n\u003cli\u003eAll production completed in-house in Germany; each spring 100% tested\u003c\/li\u003e\n\u003cli\u003eBuilt to TÜV and ISO9001 quality assurance standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\u003cli\u003eComplete H\u0026amp;R Sport Spring kit as supplied by H\u0026amp;R Springs — front and rear springs. See the installation instructions for the full bill of materials.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003ch3\u003eAdditional Parts Required\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNone.\u003c\/strong\u003e H\u0026amp;R specifies no additional hardware for this spring kit.\u003c\/li\u003e\n\u003cli\u003eFour-wheel alignment after installation — H\u0026amp;R states that alignment must be checked after any suspension ride height modification.\u003c\/li\u003e\n\u003cli\u003eProfessional installation — H\u0026amp;R states that its springs and suspensions should be installed by professional suspension mechanics only.\u003c\/li\u003e\n\u003cli\u003eA spring compressor and standard strut service tools, supplied by the installer, are required to disassemble the factory struts on this spring-only kit.\u003c\/li\u003e\n\u003cli\u003eOptional but recommended: dampers in good serviceable condition. Worn factory shocks limit the benefit of new springs.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2307\/8117\/files\/hr-springs-technical-installation-information.pdf?v=1787168924\"\u003eH\u0026amp;R Technical Information \u0026amp; Installation Guide (PDF)\u003c\/a\u003e — spring markings (F\/VA front, R\/HA rear), ride height measurement, bumpstop trimming table, alignment requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/hrsprings.com\/technical\/frequently-asked-questions\"\u003eH\u0026amp;R installation FAQ (hrsprings.com)\u003c\/a\u003e — spring orientation, progressive rate springs, ride height measurement and post-installation alignment.\u003c\/li\u003e\n\u003cli\u003eFollow the factory service manual procedure for spring replacement on the E85\/E86 chassis.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eH\u0026amp;R's official kit number for this application could not be verified on hrsprings.com, so no part number is published here. Please confirm exact fitment and part number with Speed Logic before ordering.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch2\u003eVEHICLE APPLICATIONS\u003c\/h2\u003e\n\u003ctable class=\"va-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMake \/ Model\u003c\/th\u003e\n\u003cth\u003eChassis\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW Z4 M Roadster\u003c\/td\u003e\n\u003ctd\u003eE85\u003c\/td\u003e\n\u003ctd\u003eS54 3.2L I6\u003c\/td\u003e\n\u003ctd\u003e2006–2008\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW Z4 M Coupe\u003c\/td\u003e\n\u003ctd\u003eE86\u003c\/td\u003e\n\u003ctd\u003eS54 3.2L I6\u003c\/td\u003e\n\u003ctd\u003e2006–2008\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"H\u0026R Springs","offers":[{"title":"Default Title","offer_id":41643890507942,"sku":"29119-1","price":299.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2307\/8117\/products\/SportSprings_4224e767-ea0d-4f8f-9b38-0fb9e45f119f.jpg?v=1635811415"},{"product_id":"h-r-street-perf-coil-over-for-e85-bmw-z4-m-coupe-m-roadster-2006-2008","title":"H\u0026R Street Performance Coilover – BMW Z4 M Coupe \/ M Roadster (E85)","description":"\u003cstyle\u003e.sl-desc h2{font-size:1.15em;letter-spacing:.06em;text-transform:uppercase;border-bottom:2px solid #111;padding-bottom:6px;margin:1.6em 0 .7em}.sl-desc h3{font-size:1em;margin:1.2em 0 .4em}.sl-desc ul{margin:0 0 1em 1.2em}.sl-desc li{margin:.25em 0}.va-table{width:100%;border-collapse:collapse;margin:.5em 0 1em;font-size:.95em}.va-table th{text-align:left;padding:10px 8px;border-bottom:2px solid #333;white-space:nowrap}.va-table td{padding:8px;border-bottom:1px solid #e5e5e5;vertical-align:top}.sl-note{font-size:.9em;color:#555;margin:.4em 0 1em}\u003c\/style\u003e\u003cdiv class=\"sl-desc\"\u003e\n\u003ch2\u003eOVERVIEW\u003c\/h2\u003e\n\u003cp\u003eThe H\u0026amp;R Street Performance coil over system replaces the factory struts and springs on the E85 BMW Z4 M Roadster and E86 Z4 M Coupe with fully threaded shock bodies and matched progressive-rate H\u0026amp;R springs. Ride height is adjusted at the spring seat, so the drop can be dialed in rather than fixed at a single figure.\u003c\/p\u003e\n\u003cp\u003eCustom damper valving works with the progressive rate springs to keep the S54-powered Z4 M composed on a rough road while sharpening body control. The lower center of gravity reduces body roll and improves chassis balance and turn-in, and the reduced fender gap tightens up the car's stance.\u003c\/p\u003e\n\u003cp\u003eH\u0026amp;R springs are crafted from a special 54SiCr6 spring steel and shot-peened to increase their life by more than 200%. All production is completed by H\u0026amp;R in-house, and every spring is 100% tested before leaving the ISO9001-certified production facility in Germany.\u003c\/p\u003e\n\u003ch2\u003eSPECS\u003c\/h2\u003e\n\u003cul\u003e\n\u003cli\u003eApproximate front lowering: 0.9\" – 2.0\" (height adjustable)\u003c\/li\u003e\n\u003cli\u003eApproximate rear lowering: 0.75\" – 1.7\" (height adjustable)\u003c\/li\u003e\n\u003cli\u003eFully threaded shock bodies — ride height adjusted at the spring seat\u003c\/li\u003e\n\u003cli\u003eCustom damper valving matched to progressive-rate H\u0026amp;R springs\u003c\/li\u003e\n\u003cli\u003eSprings crafted from special 54SiCr6 spring steel\u003c\/li\u003e\n\u003cli\u003eShot-peened to increase spring life by more than 200%\u003c\/li\u003e\n\u003cli\u003eAll production completed in-house in Germany; each spring 100% tested\u003c\/li\u003e\n\u003cli\u003eBuilt to TÜV and ISO9001 quality assurance standards\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch2\u003ePARTS INCLUDED\u003c\/h2\u003e\n\u003cul\u003e\u003cli\u003eComplete H\u0026amp;R Street Performance coil over kit as supplied by H\u0026amp;R Springs — fully threaded front and rear shock bodies with matched progressive-rate springs. See the installation instructions for the full bill of materials.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch2\u003eTECH RESOURCES\u003c\/h2\u003e\n\u003ch3\u003eAdditional Parts Required\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eNone.\u003c\/strong\u003e H\u0026amp;R specifies no additional hardware for this coil over kit.\u003c\/li\u003e\n\u003cli\u003eFour-wheel alignment after installation — H\u0026amp;R states that alignment must be checked after any suspension ride height modification.\u003c\/li\u003e\n\u003cli\u003eProfessional installation — H\u0026amp;R states that its springs and suspensions should be installed by professional suspension mechanics only.\u003c\/li\u003e\n\u003cli\u003eSpanner\/coil over wrenches and standard strut service tools, supplied by the installer, are needed to set and lock ride height.\u003c\/li\u003e\n\u003cli\u003eConfirm the car is not fitted with electronic\/adaptive damper control before ordering — this is a passive, non-electronic coil over system.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eInstallation\u003c\/h3\u003e\n\u003cul\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/cdn.shopify.com\/s\/files\/1\/2307\/8117\/files\/hr-springs-technical-installation-information.pdf?v=1787168924\"\u003eH\u0026amp;R Technical Information \u0026amp; Installation Guide (PDF)\u003c\/a\u003e — spring markings, ride height measurement and adjustment, bumpstop trimming table, alignment requirements.\u003c\/li\u003e\n\u003cli\u003e\n\u003ca href=\"https:\/\/hrsprings.com\/technical\/frequently-asked-questions\"\u003eH\u0026amp;R installation FAQ (hrsprings.com)\u003c\/a\u003e — spring orientation, progressive rate springs, ride height measurement and post-installation alignment.\u003c\/li\u003e\n\u003cli\u003eFollow the factory service manual procedure for strut and spring replacement on the E85\/E86 chassis.\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eNotes\u003c\/h3\u003e\n\u003cul\u003e\u003cli\u003eH\u0026amp;R's official kit number for this application could not be verified on hrsprings.com, so no part number is published here. Please confirm exact fitment and part number with Speed Logic before ordering.\u003c\/li\u003e\u003c\/ul\u003e\n\u003ch2\u003eVEHICLE APPLICATIONS\u003c\/h2\u003e\n\u003ctable class=\"va-table\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eMake \/ Model\u003c\/th\u003e\n\u003cth\u003eChassis\u003c\/th\u003e\n\u003cth\u003eEngine\u003c\/th\u003e\n\u003cth\u003eYears\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW Z4 M Roadster\u003c\/td\u003e\n\u003ctd\u003eE85\u003c\/td\u003e\n\u003ctd\u003eS54 3.2L I6\u003c\/td\u003e\n\u003ctd\u003e2006–2008\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eBMW Z4 M Coupe\u003c\/td\u003e\n\u003ctd\u003eE86\u003c\/td\u003e\n\u003ctd\u003eS54 3.2L I6\u003c\/td\u003e\n\u003ctd\u003e2006–2008\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\n\u003c\/div\u003e","brand":"H\u0026R Springs","offers":[{"title":"Default Title","offer_id":41643911184550,"sku":"29097-1","price":1782.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/2307\/8117\/products\/PremiumCoilOvers__96843.1596654419_336d07f7-9113-4d77-a8c2-626435dda925.jpg?v=1635811733"}],"url":"https:\/\/speedlogicauto.com\/collections\/z4-e85-s54.oembed","provider":"SPEED LOGIC","version":"1.0","type":"link"}