Mid-Length Headers for Mercedes C55 CLK55 SLK55 M113 AMG 5.4L V8 NA

Unlock serious performance from your Mercedes V8 with our mid-length, high-flow performance headers for the naturally aspirated 5.4L M113 — fitting the C55, CLK55, and SLK55 AMG. TIG-welded stainless steel construction reduces backpressure, improves throttle response, and unleashes the deep, aggressive AMG growl. A dyno-backed +35 hp with tuning and supporting mods.

Key Features

• Backpressure reduction: high-flow design improves engine breathing.
• Power gains: +35 hp with tuning and supporting mods.
• Exhaust note: deep, raw AMG growl under load.
• Includes mid-pipes: welding required for installation.
• LHD & RHD compatibility: designed to fit global vehicles.
• Material: TIG-welded stainless steel, built for durability.

Fitment Compatibility

Pair with our custom ECU tune for the M113 for maximum performance gains.

Why Buy from BenzUnited

• Trusted by tuners and Mercedes enthusiasts.
• Fast shipping, responsive support, and fitment help.
• Specialized in hard-to-source Mercedes performance upgrades.

Buy With Confidence

• Free U.S. shipping with tracking, insured and securely packaged.
• Fitment confirmed before you buy: not sure it fits your exact car? Send us your VIN and we'll verify before you order.
• Mercedes-AMG specialists: we focus exclusively on Mercedes platforms — we know the M113 inside out.
• Real support: questions before or after purchase go straight to us, not a call center.

Confirm fitment or ask a question →

For off-road and racing use only. Not CARB legal. Welding required; professional installation highly recommended. Ships within 1–2 business days.