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USP Marine Tuning High-Flow Air Intake Pipe For Verado L6 350-400

USP Marine Tuning


  • $214.99
    Unit price per 
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NOTICE: This is a Race-only product. The use or installation of this product outside of the intended closed circuit racing purpose may be illegal under the Federal Clean Air Act (42 U.S.C. § 7522(A)(3)).


The USP Marine High Flow Intake Pipe provides a significant flow increase while refining the performance supercharged sound we all love! The system includes a variety of changes over the factory system for maximum performance, longevity, and peace of mind combating the evil “boost leak”. Compatible with the factory piping, we utilize CNC adapters to minimize air disruption during the hose connection surface. The factory plastic resonator piping sports a restrictive design, which also is prone to cracking over time. Our intake pipe replaces the OEM piping with 4-ply wire reinforced silicone piping, as used in our 1000HP turbo kits for USP Motorsports. All clamps are spec 316 Stainless, the marine standard for corrosion resistance. The silicone piping not only holds up better, but our design provides +30% CFM over the factory. The flow difference provides an increased throttle response and improves intake air temperature during WOT throttle applications.

This replaces factory part # (885354T01, 8M6003032, 815504256, 888988016). 

Fits the following engines:
  • Mercury Verado L6 350
  • Mercury Verado L6 400M
  • Mercury Verado L6 400R



  • Increased Airflow
  • +30% CFM 
  • Refined Performance Sound
  • Reduced Restriction
  • Replaces factory damage-prone plastic design
  • Constructed using Wire Reinforced Silicone Coupler 
  • 316 Stainless Hardware

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