• UMI6400-1.jpg
    • UMI6400-1.jpg

    UMI Performance C10/C15 Lowering Suspension Kit — 1973-1987 Chevy & GMC Trucks & Suburbans | 4.5in Front / 6in Rear Drop | 6400-1

    Vendor: UMI Performance
    Part Number: 6400-1
    $1,138.99

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    Not sure it fits your vehicle?
    Email sales@berryperformancesales.com with your year, make, model and engine, and we'll help you check fitment before you order.
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    Product DetailsFAQReviewsRelated Products

    UMI Performance's C10 lowering suspension kit drops the front 4.5 inches and the rear 6 inches for an aggressive lowered stance on 1973 through 1987 GM C10 and C15 fullsize trucks and Suburbans. The kit combines lowering coil springs, spindles, and the required hardware so the ride height comes down while the suspension geometry stays sorted for street driving. UMI Performance manufactures this kit in the USA.

    Specifications:

    • Part type: Front and rear lowering suspension kit
    • Front drop: 4.5 inches
    • Rear drop: 6 inches
    • Includes: Lowering coil springs, spindles, hardware
    • Made in the USA
    • Part number: 6400-1

    Vehicle Applications:

    • 1975 Chevrolet C10
    • 1976 Chevrolet C10
    • 1977 Chevrolet C10
    • 1978 Chevrolet C10
    • 1979 Chevrolet C10
    • 1980 Chevrolet C10
    • 1981 Chevrolet C10
    • 1982 Chevrolet C10
    • 1983 Chevrolet C10
    • 1984 Chevrolet C10
    • 1985 Chevrolet C10
    • 1986 Chevrolet C10
    • 1973 Chevrolet C10 Pickup
    • 1974 Chevrolet C10 Pickup
    • 1973 Chevrolet C10 Suburban
    • 1974 Chevrolet C10 Suburban
    • 1975 Chevrolet C10 Suburban
    • 1976 Chevrolet C10 Suburban
    • 1977 Chevrolet C10 Suburban
    • 1978 Chevrolet C10 Suburban
    • 1979 Chevrolet C10 Suburban
    • 1980 Chevrolet C10 Suburban
    • 1981 Chevrolet C10 Suburban
    • 1982 Chevrolet C10 Suburban
    • 1983 Chevrolet C10 Suburban
    • 1984 Chevrolet C10 Suburban
    • 1985 Chevrolet C10 Suburban
    • 1986 Chevrolet C10 Suburban
    • 1987 Chevrolet R10
    • 1975 GMC C15
    • 1976 GMC C15
    • 1977 GMC C15
    • 1978 GMC C15
    • 1975 GMC C15 Suburban
    • 1976 GMC C15 Suburban
    • 1977 GMC C15 Suburban
    • 1978 GMC C15 Suburban
    • 1973 GMC C15/C1500 Pickup
    • 1974 GMC C15/C1500 Pickup
    • 1979 GMC C1500
    • 1980 GMC C1500
    • 1981 GMC C1500
    • 1982 GMC C1500
    • 1983 GMC C1500
    • 1984 GMC C1500
    • 1985 GMC C1500
    • 1986 GMC C1500
    • 1987 GMC R1500

    FAQ

    What does the UMI Performance 6400-1 lowering kit include?

    It includes lowering coil springs, spindles, and the mounting hardware needed to lower the front 4.5 inches and the rear 6 inches.

    What vehicles does the 6400-1 lowering kit fit?

    It fits 1973 through 1987 Chevrolet and GMC C10 and C15 fullsize trucks and Suburbans. See the Vehicle Applications list for exact years.

    How much does this kit lower the truck?

    The kit lowers the front 4.5 inches and the rear 6 inches.

    Where is the 6400-1 lowering kit made?

    UMI Performance manufactures this lowering kit in the USA.

    Shipping Policy
    • Free shipping on orders over $99 (excludes freight shipments).
    • In-stock orders typically ship within 1 to 2 business days. Weekend and holiday orders are processed the next business day.
    • Orders ship from Defiance, Ohio and a nationwide network of warehouses and manufacturers.
    • Items showing an ETA are not in stock yet. ETAs come from the manufacturer and can change.
    • No P.O. Boxes. International orders need a shipping quote, so email us first.

    Read the full Shipping Policy
    Return Policy
    • 30-day return window from the ship date. Returns must be approved first; email sales@berryperformancesales.com with your order number.
    • Items must be unused, complete and in the original packaging.
    • A 20% restocking fee applies, and return shipping is paid by the buyer.
    • Not returnable: installed or modified parts, opened or used programmers and tuners, custom orders, Open Box, and Clearance or Final Sale items.
    • Damaged, defective or incorrect items must be reported within 48 hours of delivery with photos.

    Read the full Return Policy
    Disclaimer

    All products are sold for off-road use only unless otherwise specified. Buyer assumes all responsibility for installation and operation. Seller is not liable for any incidental, indirect, or consequential damages — including engine failure, labor costs, or vehicle downtime — resulting from the use of any product sold.

    By making a purchase from Berry Performance Sales, you acknowledge and agree to abide by the terms and conditions of these Policies.

    For any questions or concerns, please contact us — we’re always happy to help.

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