National Spring Ultra Leaf Springs

Brand: National Spring | Part #SUS-E04575

Category: Suspension > Leaf Springs

The National Spring Ultra Leaf Springs (P/N SUS-E04575) is a direct-fit Leaf Springs for the vehicles listed in the fitment section. Damping curve is tuned to match factory ride height and spring rate, preserving the original handling and steering feel. Sourced from National Spring, a recognized supplier in the aftermarket auto parts channel. Part number SUS-E04575 is the manufacturer reference — match it against your old part or VIN-based lookup to confirm you have the right unit. Confirmed fitment on 2018–2025 Buick, Infiniti, Audi including Encore, Envision, Encore GX, Q50, QX60, A3. Use the year/make/model selector above to verify your exact configuration before checkout. Ships from a US warehouse in 1–2 business days. Free shipping on orders $75+, flat-rate ground otherwise. Backed by a 90-day return window — if the part doesn't fit or the wrong unit was shipped, send it back for a full refund.

Price: $253.99 | In stock — ships within 1-2 business days. Free shipping.