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- AUTHENTICPART
Part Brand: AST
Part Number: ASTLS-14-444
Vehicle Fitment
- 1982–1990 BMW 6 Series 628CSi/633CSi/635CSi (E24-chassis, all trims, 2.8L–3.5L I6)
Features
- Progressive-rate coil design for lowered stance with retained ride comfort
- Constructed from high-tensile chromium-silicone wire for strength and consistency
- Cold-wound and heat-treated to relieve internal stresses
- Individually shot-peened to improve fatigue resistance
- Phosphate treated and powder-coated for long-term corrosion protection
- 35 mm drop front and rear to lower center of gravity and enhance handling
- Engineered as OEM direct replacements—no aftermarket adapters needed
- Lifetime warranty against breakage for long-term peace of mind
Specifications
- Lowering: 35 mm front & 35 mm rear
- Material: high-tensile chromium-silicone steel
- Finish: phosphate pre-treatment + durable powder coating
- Chassis: E24 (6 Series) platform
- Fitment includes 628CSi, 633CSi, 635CSi models from 1982–1990
- OEM replacement—maintains compatibility with stock dampers
- Not suitable for vehicles with level-adjusting suspension or electronic ride-height control
- Emissions status: Exempt (not emissions-regulated)
Included Components
- 2× front progressive lowering springs (35 mm drop)
- 2× rear progressive lowering springs (35 mm drop)
Product Description
The AST ASTLS-14-444 Progressive Lowering Springs are tailor-made for the classic BMW 6 Series (E24 chassis), spanning 1982 through 1990 and covering 628CSi, 633CSi, and 635CSi models. Engineered to provide a sleek 35 mm drop at both front and rear, these springs lower the center of gravity and sharpen handling dynamics without compromising ride comfort. Crafted with high-tensile chromium-silicone wire, they’re cold-wound, heat-treated, shot-peened, and finished with phosphate and powder coating for exceptional durability and corrosion resistance.
Designed as direct OEM replacements, ASTLS-14-444 springs install with no modifications required and retain compatibility with stock dampers. Ideal for enthusiasts seeking refined aesthetics and performance, these springs also come backed by a lifetime warranty against breakage—offering long-lasting confidence in both daily driving and spirited road use.
*Parts are for USA spec vehicles, please contact us to verify fitment on JDM & international models.
· · · SHIPPING · · ·
- Free shipping across the contiguous 48 United States (excludes Hawaii and Alaska). Item(s) ships on the same day or within 1 business day. Delivery time is within 2 to 4 business days excluding next day deliveries. Orders over $750 require signature for delivery.
- Canada customers - If does not collect import & duty fees during checkout, the shipping carrier will collect them prior to delivery.
· · · RETURNS · · ·
Your complete shopping satisfaction is our #1 priority. If an item you ordered from us does not meet your expectations, please contact us within 30 days of receiving the item(s). If your order arrives damaged from shipping please contact us and we will provide a prepaid return label to send back for a replacement or refund.
- Returned items must be in the original packaging (including plastic wrapped items) and in brand new condition.
- Any returns received installed, mounted, used or missing components will be subject to return fee\'s.
· · · PAYMENTS · · ·
- We accept all payment methods through \'s payment system
- PayPal, and all major credit cards/debit cards are accepted.
· · · response · · ·
- Customer satisfaction is a top priority for us. If you have any issues with your order, please let us know. We will make every effort to resolve any problems and ensure you are satisfied.
· · · CONTACT US · · ·
- We appreciate your business. If you have any questions, please message us through and we will respond within 24 hours on weekdays. Feel free to browse our store for other available items. Thank you again for choosing to shop with us!
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