Dežru Spec-S • Street & Touring 04-08 Audi A4 Coilover System

Balanced daily comfort with real back-road capability.

Designed to lower your car by approximately 25–30 mm while maintaining composure over real-world roads, the Spec-S sharpens turn-in and body control without beating you up on the commute.

Inverted monotube shocks Nickel-plated shock bodies Vehicle Specific Spring Rates

Dežru Spec-S Coilovers – 2004–2008 Audi A4

The Dežru Spec-S coilover system is engineered specifically for the 2004–2008 Audi A4, a chassis that benefits greatly from modern damping control and properly balanced spring rates. Designed around the A4’s suspension geometry and weight distribution, the Spec-S delivers improved composure and confidence without sacrificing daily usability.

Developed for drivers who daily their A4 but still enjoy spirited back-road driving and occasional HPDE track days, the Spec-S features digressive piston valving that provides strong low-speed chassis support during braking, turn-in, and transitions, while remaining compliant over uneven pavement and surface imperfections. Rather than chasing excessive stiffness, this setup targets a balanced ride frequency in the ~2.0–2.2 Hz range, giving you clear feedback and stability without harshness.

Fixed-length damper bodies paired with a 25–30 mm adjustable lowered ride height ensure proper suspension stroke and geometry are preserved. This approach maintains usable bump travel and consistent roll behavior, allowing the A4 to remain predictable and confidence-inspiring during both daily driving and aggressive use.

Key Features

Digressive monotube dampers for controlled body motion, consistent damping performance, and clear driver feedback.
Fixed-length damper bodies with 25–30 mm adjustable lowered ride height to preserve suspension geometry and usable travel.
Adjustable damping to fine-tune rebound for daily driving, canyon roads, or HPDE track events.
450 lb/in front and 650 lb/in rear spring rates, selected to balance front-end control with rear stability for a true street and track blend.
Linear HyperCoil springs for predictable load transfer and smooth, consistent response throughout suspension travel.
OEM-style upper mounts to reduce NVH while maintaining proper fitment and alignment consistency.
Hand-built, dyno-matched pairs to ensure precise left-to-right damping consistency.

Performance Character

The Spec-S enhances the Audi A4’s composure by reducing excessive body motion while preserving comfort and traction. The digressive damping profile delivers firm, supportive control during initial inputs and transitions, paired with controlled compliance that keeps the tires planted as grip levels increase.

The result is a balanced, refined, and confidence-inspiring driving experience that remains comfortable for daily use, yet stable and responsive when pushed hard.

Dežru Performance Suspension warrants to the original purchaser that these parts manufactured and/or sold by Dežru Performance Suspension (the product) is free from defects in material and workmanship under normal use. Dežru Performance Suspension warrants that the product will perform substantially in accordance with the specifications set forth in the documentation provided with it. The above express warranties are made for a period of the lesser of 12,000 miles or 36 months from the date the product is installed in your vehicle. Any improper use, operation beyond capacity, substitution or addition of parts not approved by Dežru Suspension in writing, any alteration or repair by others, or any removal, defacing or altering of the identification shall void this warranty. There is no warranty on high-performance or race related parts due to the nature of usage.