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    • M112 3.2–3.7L V6 NA — C320 / CLK320 / E320
    • M112K 3.2L V6 Supercharged — C32 / SLK32
    • M113 5.0L V8 NA — E500 / CLS500
    • M113 5.4L V8 NA — C55 / CLK55 / SLK55
    • M113K 5.4L V8 Supercharged — E55 / CLS55 / SL55
    • M133 2.0L I4 Turbo — CLA45 / GLA45
    • M156 6.2L V8 NA — C63 / E63 / CLS63
    • M157 5.5L V8 BiTurbo — E63 / CLS63 / S63
    • M177 4.0L V8 BiTurbo — C63 / C63 S
    • M177 4.0L V8 BiTurbo — E63 / E63 S
    • M178 4.0L V8 BiTurbo — AMG GT / GT S / GT R
    • M256 3.0L I6 Turbo — E53 / GLE53 / GT53
    • M270 2.0L I4 Turbo — CLA250 / GLA250
    • M271 1.8L I4 Turbo — C250 / SLK250
    • M272 2.5–3.5L V6 NA — C300 / C350 / E350
    • M273 5.5L V8 NA — E550 / CLS550 / S550
    • M274 2.0L I4 Turbo — C300 / E300 / GLC300
    • M276 3.0L V6 BiTurbo — C43 / E43 / E450
    • M276 3.5L V6 NA — C350 / E350 / GLK350 / ML350
    • M278 4.7L V8 BiTurbo — E550 / CLS550 / S550
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  • Home
  • Performance
    • M112 3.2–3.7L V6 NA — C320 / CLK320 / E320
    • M112K 3.2L V6 Supercharged — C32 / SLK32
    • M113 5.0L V8 NA — E500 / CLS500
    • M113 5.4L V8 NA — C55 / CLK55 / SLK55
    • M113K 5.4L V8 Supercharged — E55 / CLS55 / SL55
    • M133 2.0L I4 Turbo — CLA45 / GLA45
    • M156 6.2L V8 NA — C63 / E63 / CLS63
    • M157 5.5L V8 BiTurbo — E63 / CLS63 / S63
    • M177 4.0L V8 BiTurbo — C63 / C63 S
    • M177 4.0L V8 BiTurbo — E63 / E63 S
    • M178 4.0L V8 BiTurbo — AMG GT / GT S / GT R
    • M256 3.0L I6 Turbo — E53 / GLE53 / GT53
    • M270 2.0L I4 Turbo — CLA250 / GLA250
    • M271 1.8L I4 Turbo — C250 / SLK250
    • M272 2.5–3.5L V6 NA — C300 / C350 / E350
    • M273 5.5L V8 NA — E550 / CLS550 / S550
    • M274 2.0L I4 Turbo — C300 / E300 / GLC300
    • M276 3.0L V6 BiTurbo — C43 / E43 / E450
    • M276 3.5L V6 NA — C350 / E350 / GLK350 / ML350
    • M278 4.7L V8 BiTurbo — E550 / CLS550 / S550
  • Shop by Part Type
    • Downpipes
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    • Turbos & Boost Control
    • Cooling Upgrades
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    • Suspension
    • Brakes & Braking Upgrades
    • Wheels & Spacers
    • Lighting
    • Parking Sensors & Parktronic
    • Interior Trim & Accessories
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  • Complete Methanol Injection Kit for Mercedes C63 / C63S AMG – Tank, Controller, Nozzles & Couplers

    Methanol Injection Kit for Mercedes C63 / C63S AMG (M177)

    Methanol Injection Kit for Mercedes C63 / C63S AMG (M177)

    Regular price $850.00 USD
    Regular price Sale price $850.00 USD
    Unit price /  per 
  • Complete water methanol injection kit for Mercedes W213 E63 / E63S AMG (M177)

    Water Methanol Injection Kit – W213 E63 / E63S AMG (M177 Engine)

    Water Methanol Injection Kit – W213 E63 / E63S AMG (M177 Engine)

    Regular price $899.95 USD
    Regular price Sale price $899.95 USD
    Unit price /  per 
  • C63 AMG M177 Methanol Couplers with Integrated Nozzle Mounts

    C63 AMG Methanol Couplers w/ Nozzle Holders (M177)

    C63 AMG Methanol Couplers w/ Nozzle Holders (M177)

    Regular price $195.00 USD
    Regular price Sale price $195.00 USD
    Unit price /  per 
  • E85 Flex-Fuel Conversion Kit for Mercedes M156 / M113K

    E85 Flex-Fuel Conversion Kit for Mercedes M156 / M113K

    E85 Flex-Fuel Conversion Kit for Mercedes M156 / M113K

    Regular price From $950.00 USD
    Regular price Sale price From $950.00 USD
    Unit price /  per 
  • Set of 8 high-performance 630cc fuel injectors for Mercedes E55 AMG M113K – Direct fit with wiring adapters for increased fuel flow and tuning support

    630cc Fuel Injectors E55 AMG CLS55 High-Performance – Upgrade for M113K V8

    Sale

    630cc Fuel Injectors E55 AMG CLS55 High-Performance – Upgrade for M113K V8

    Regular price $415.00 USD
    Regular price $499.00 USD Sale price $415.00 USD
    Unit price /  per 
    Sale
  • 630cc Fuel Injectors M112k AMG 6-Pack

    630cc Fuel Injectors M112k AMG 6-Pack

    630cc Fuel Injectors M112k AMG 6-Pack

    Regular price $335.00 USD
    Regular price Sale price $335.00 USD
    Unit price /  per 
  • 630cc Fuel Injectors C63 AMG E63 CLS63 High-Performance – Upgrade for M156 V8

    630cc Fuel Injectors C63 AMG E63 CLS63 High-Performance – Upgrade for M156 V8

    630cc Fuel Injectors C63 AMG E63 CLS63 High-Performance – Upgrade for M156 V8

    Regular price $500.00 USD
    Regular price Sale price $500.00 USD
    Unit price /  per 
  • Stage 2 billet turbo upgrade for W205 Mercedes-AMG C63 and C63 S with M177 4.0L bi-turbo engine

    Stage 2 Billet Turbo Upgrade for Mercedes-AMG C63 & C63 S (W205) – M177 4.0L BiTurbo

    Stage 2 Billet Turbo Upgrade for Mercedes-AMG C63 & C63 S (W205) – M177 4.0L BiTurbo

    Regular price $4,995.00 USD
    Regular price Sale price $4,995.00 USD
    Unit price /  per 
  • Pair of Mercedes billet aluminum SAI block-off plates with hardware – performance air injection delete kit by BenzUnited USA.

    Mercedes SAI Block-Off Plates – Billet Aluminum Air Injection Delete USA

    Mercedes SAI Block-Off Plates – Billet Aluminum Air Injection Delete USA

    Regular price $85.00 USD
    Regular price Sale price $85.00 USD
    Unit price /  per 
  • 550cc fuel injectors for Mercedes M113K AMG E55, CLS55, SL55, S55, and CL55 – high flow performance upgrade kit

    550cc Fuel Injectors M113K 03-11 Mercedes E55 AMG CLS55 CL55 S55 SL55

    550cc Fuel Injectors M113K 03-11 Mercedes E55 AMG CLS55 CL55 S55 SL55

    Regular price $340.00 USD
    Regular price Sale price $340.00 USD
    Unit price /  per 
  • Set of Mercedes-AMG fuel injector adapter harnesses for upgraded injector installation

    AMG Fuel Injector Upgrade – Plug & Play Adapter Harnesses

    Sale

    AMG Fuel Injector Upgrade – Plug & Play Adapter Harnesses

    Regular price $75.00 USD
    Regular price $85.00 USD Sale price $75.00 USD
    Unit price /  per 
    Sale
  • Water-Methanol Injection on Mercedes — Power Gains, Cooling, and Safety Explained

    Water-Methanol Injection on Mercedes — Power Ga...

    July 31, 2025
    Blog

    Water-Methanol Injection on Mercedes — Power Ga...

    July 31, 2025
    Blog
  • Front and auxiliary heat exchanger cooling bundle for Mercedes-AMG C63 C63 S W205 M177

    W205 C63 & C63 S Cooling & Heat Management Guid...

    February 11, 2026
    Blog

    W205 C63 & C63 S Cooling & Heat Management Guid...

    February 11, 2026
    Blog

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BenzUnited Parts sources OEM and performance upgrades for Mercedes-Benz platforms — from daily drivers to full builds, with fast shipping and fitment support from people who know these cars inside and out.

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