Springs are the easiest and most cost effective way to improve your handling, get a more aggressive rake, and give your vehicle a more attractive stance. We do recommend replacing your shocks and struts at the same time with either Bilstein or Koni dampers.
BMW has tuned a comfortable yet performance oriented suspension system across their model offering. The springs used are a very sophisticated design with both tapered wire diameter and progressive spring rates to ensure the best possible ride quality under varying loads and conditions. Due to environmental conditions, the original coating is commonly compromised thus creating a weak point which yields to failure (cracked springs). Replace your cracked springs with replacement parts from Bilstein.
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If you own an E46 3-Series, you're likely well aware that the factory rear coil springs are a notorious weak point. Due to the "Mini Block" barrel design and the elements, the bottom pigtails of the rear springs frequently crack and break, throwing off your alignment, causing uneven tire wear, and ruining your cornering dynamics.
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ST Sport Springs lower the center of gravity to reduce body roll in corners and limit weight transfer under acceleration. Manufactured to the highest worldwide quality standards, each spring is custom wound from high-tensile steel and rigorously tested and inspected to ensure absolute strength and reliability. Note: For vehicles with sport suspension, lowering height will be less than listed.
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