{"product_id":"swift-sport-spec-r-springs-f82-m4","title":"Swift Sport Spec-R Springs - F82 M4","description":"\u003cdiv data-mce-fragment=\"1\" align=\"center\" style=\"text-align: left;\"\u003ePurpose-built for track enthusiasts, Swift's Spec-R Springs transform the F82 M4's suspension dynamics through precision engineering. The optimized spring rates—calibrated to factory shock valve limits—enhance cornering aggression while the recalibrated ride height maximizes suspension geometry for superior traction. Stock dampers handle these rates capably, though upgrading to performance shocks unlocks additional gains. The result: sharper turn-in, reduced body roll, and a platform ready for serious circuit work. Engineered for drivers who demand more from their M4.\u003c\/div\u003e\n\u003cp\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cspan data-mce-fragment=\"1\"\u003eSwift Spec-R Sport Springs were engineered with 3 characteristics in mind.\u003c\/span\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eModified ride height compared to Sport Springs to maximize optimal suspension geometry\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFurther increasing the spring rate to enhance overall performance. The increase in spring rate is based on the upper limits of the vehicles factory shock valving\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eMaintaining optimal comfort level for street use\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003eSwift's Spec-R Springs leverage proven spring technology with elevated stiffness and refined geometry tailored for circuit performance. Engineered to the threshold of factory shock capacity, these springs deliver track-validated handling without sacrificing street usability. The same material science and winding precision as Swift's sport line ensures durability and consistency, while the aggressive rate and modest ride height adjustment maximize suspension response. Ideal for drivers balancing weekend track days with daily driving demands on the F82 M4.\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cbr data-mce-fragment=\"1\"\u003e\u003cstrong data-mce-fragment=\"1\"\u003eFeatures:\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cul data-mce-fragment=\"1\"\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSpring Rate Front: 279 Lbs\/Inch\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eSpring Rate Rear: 726 Lbs\/Inch\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eFront Lowering: -1.1 Inch\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eRear Lowering: -0.9 Inch\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eImproved handling\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eMade for the track enthusiast\u003c\/li\u003e\n\u003cli data-mce-fragment=\"1\"\u003eReduces body roll\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cp\u003e\u003cstrong data-mce-fragment=\"1\"\u003eFITMENT\u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003e\u003c\/p\u003e\n\u003cp\u003e- BMW M4 F82 2015 +\u003c\/p\u003e\n\u003cp\u003e\u003cstrong data-mce-fragment=\"1\"\u003eNote: \u003c\/strong\u003e\u003cspan data-mce-fragment=\"1\"\u003e\u003c\/span\u003eVehicle drop rate is based on the year, model and option of the test vehicle, and may vary based on each vehicle condition\u003c\/p\u003e","brand":"Horizon Motorsport","offers":[{"title":"Default Title","offer_id":53700801003804,"sku":"4X908R","price":349.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0734\/8266\/6268\/files\/Swift1_2000x_7416023f-141a-4b50-b4ab-d5f13c5ac06e.png?v=1768078356","url":"https:\/\/revlineperformance.com\/products\/swift-sport-spec-r-springs-f82-m4","provider":"Revline Performance","version":"1.0","type":"link"}