BMW F8X M3 / M4 Composite GTS Reinforcement Plate Cover

BMW Part 51 75 8 066 101

The BMW F8X M3 / M4 Composite GTS Reinforcement Plate Cover is an Original BMW composite carbon fiber/GRP underbody reinforcement plate cover for the F80 M3 and F82/F83 M4 — a structural underfloor component that provides protection for the floor pan and underbody in the demanding conditions of sustained track use, where road debris, curb strikes, and repeated thermal cycling place loads on the chassis floor that road driving never generates.

What This Component Does

The F80 M3 and F82 M4 were designed with a road-biased underbody specification — BMW's M4 GTS program identified the need for advanced underfloor aerodynamic protection when these cars were developed for sustained circuit work. The GTS Plate adds an aerodynamic layer under the engine area / pan that distributes the aerodynamic loads generated by high-speed road driving, and the deflection of debris that accumulate during track driving. On a car that sees regular circuit use — particularly on tracks — it's a genuine mechanical protection upgrade rather than a cosmetic addition. The composite construction keeps weight addition to a minimum while providing meaningfully greater protection than the standard underbody panels.

Key Benefits

• Original BMW — GTS specification composite reinforcement
• Carbon fiber / GRP composite construction — structural protection with minimal weight penalty
• Protects F80/F82/F83 floor pan from kerb strike and debris impact loads on circuit
• Developed for the BMW M4 GTS track program — proven circuit application
• Correct OEM fitment — no fabrication or modification required
• Recommended for F80 M3 and F82/F83 M4 used regularly on circuit

Product Specifications