Flatout Suspension 09-16 Audi A4 B8 [GR40] GR4-AUDIA4B8

DISCLAIMER: This is a made to order item. The lead time for this product is 4-8 weeks.

The Flatout GR40 Coilovers for the 2009-2016 Audi A4 B8 are engineered for drivers who demand precision, strength, and consistency in rally and motorsport competition. Designed as a 0–2” adjustable rally suspension system, the GR40 allows you to increase ride height and fine-tune chassis setup for tarmac, gravel, or rallycross conditions while maintaining balance and durability under extreme use.

Built for punishing terrain and repeated high-speed impacts, the GR40 features inverted front shocks for maximum structural strength and reduced flex. Select applications include external reservoir rear shocks for increased oil capacity, improved cooling, and enhanced fade resistance during extended competition sessions.

Flatout’s proprietary rally valving combined with bypass piston technology delivers compliance over small chatter at low speeds and exceptional control during aggressive driving. Soft rate LPS 2.5 ID linear springs provide comfort during transit stages while maintaining competitive performance under load.

OEM-style top mounts preserve quiet operation and reduce NVH, making this system suitable for dual-purpose builds. Electroplated shock bodies offer 7–10 years of corrosion resistance, and the fully rebuildable design ensures long-term serviceability for competitive use.

With 1-way rebound adjustment offering 20 points of tuning and backed by a 3-year warranty, the GR40 is a race-ready suspension system proven in rallycross and grassroots motorsport environments.

FITMENT

Vehicle: Audi A4 B8
Years: 2009-2016
Chassis: B8
Also Compatible With: Audi A4 Allroad (2009-2016)
Application: Rally, rallycross, and motorsport competition
Ride Height Adjustment: 0–2" increase over OEM

Key Features

0–2" adjustable ride height increase
Inverted front shocks for rally-grade strength
External reservoir rear shocks on select applications
Proprietary rally valving with bypass pistons
Soft rate LPS 2.5 ID linear springs
OEM-style top mounts for reduced NVH
Electroplated shock bodies with 7–10 years corrosion resistance
Fully rebuildable coilover construction
1-way rebound adjustable with 20 tuning points
3-year manufacturer warranty
Compatible with Audi A4 Allroad