• M113 Mid-Length Headers for Mercedes C55 CLK55 SLK55 AMG – Full Kit with Gaskets
  • M113 Mid-Length Headers Angled View – Mercedes C55 CLK55 SLK55 AMG 5.4L V8
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BenzUnited Parts

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

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

$795.00 USD
$850.00 USD $795.00 USD
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Shipping calculated at checkout.

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.

Key Features

  • Backpressure reduction: high-flow design improves engine breathing.
  • 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

Model Engine Years
Mercedes-Benz C55 AMG M113 5.4L Naturally Aspirated V8 2004–2006
Mercedes-Benz CLK55 AMG M113 5.4L Naturally Aspirated V8 2003–2006
Mercedes-Benz SLK55 AMG M113 5.4L Naturally Aspirated V8 2005–2009

You will likely need: O2 sensor extension harness

Headers relocate the rear (post-cat) oxygen sensors away from the factory harness. Our 24″ O2 sensor extension harness covers the gap with no cutting or splicing. Mercedes V8s need two. Far cheaper to add now than to put the car back on the lift.

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.
  • Specialised 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 →

Welding required; professional installation highly recommended. Ships within 1–2 business days.

Off road use only. Not legal for use on emissions-controlled vehicles or public roads.

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