SKU: ACC-B2103S/5D | UPC: astACC-B2103S/5D
AST 5100 Competition Series Coilover Suspension - 2014-2020 BMW M3 (F80) / M4 (F82/F83) Including Pre-LCI & LCI Models
AST 5100 Competition Series coilovers bring race-proven monotube damper technology tuned for BMW F80 M3 sedan and F82/F83 M4 coupe/convertible models. Inverted front struts external reservoirs independent rebound compression adjustments and height-adjustable perches deliver precise handling reduced body roll and damping control for street canyon carving or track days with daily ride comfort. This complete bolt-on kit fits all variants including Competition CS and GTS with factory EDC delete compatibility.
Key Features
- Monotube Inverted Front Struts: Larger piston diameter reduces unsprung weight for immediate response and sharper steering feedback.
- External Reservoir All Four Corners: Boosts oil volume nitrogen stability for fade-free performance during extended hot track sessions.
- 12-Click Rebound Adjustment: Top-mounted knobs on all dampers allow quick trackside tuning without tools.
- 10-Click High-Speed Low-Speed Compression: Reservoir adjustments provide chassis-specific control for bumps and high-speed corners.
- Height Adjustable: 30-60 mm drop front/rear via threaded body lower bracket maintains geometry.
- Spring Rates: Front 500 lbs/in (9 N/mm) linear rear 800 lbs/in (14 N/mm) progressive with helpers for balanced grip.
- Rebuildable Design: Serviceable worldwide with AST network for long-term reliability.
- Top Mounts: Reinforced camber-adjustable fronts with monoball bearings enhance alignment precision.
Product Notes
- Complete kit includes front struts rear shocks reservoirs springs dust boots tools hardware.
- Part number ACC-B2103S/5D (5D for external reservoir compression adjustment) approximate kit weight 52-56 lbs.
- Fits Pre-LCI LCI F80 M3 F82/F83 M4 all variants EDC delete required to cancel electronic damping errors.
Installation Notes
- Bolt-on using factory mounting points professional alignment corner balancing recommended.
- EDC cancellation modules or coding needed to eliminate dash errors.
- Installation time 4-6 hours with lift includes all hardware.
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2014-2018 | BMW | M3 | Sedan F80 (Base Competition Competition Sport CS) |
| 2014-2020 | BMW | M4 | Coupe F82 (Base Competition CS GTS) |
| 2014-2020 | BMW | M4 | Convertible F83 (Base Competition) |
Why Choose AST Suspension?
- Dutch manufacturer with decades of motorsport wins in DTM WTCC club racing.
- 5100 Series trusted by pro teams track enthusiasts worldwide.
- 2-year unlimited mileage warranty full rebuild service available.
Frequently Asked Questions
-
Q: Does this kit delete EDC?
A: Yes mechanical dampers replace electronic system use EDC delete modules or coding to clear dash errors. -
Q: Can factory top mounts be retained?
A: No kit provides upgraded camber plates with monoball bearings for better performance durability. -
Q: What are the spring rates?
A: Front 9 N/mm linear rear 14 N/mm progressive ideal street/track balance custom rates optional.
Shipping & Handling
- Method: Standard ground shipping two oversized boxes
- Availability: In stock - ships same or next business day
- Packaging: Front box 36" x 18" x 14" Rear box 32" x 18" x 14"
- Weight: Approximately 65-70 lbs total
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