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USP Marine Tuning High-Flow Air Intake Pipe For Verado 135-300

USP Marine Tuning


  • $249.99 USD
    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)).



USP Marine is pleased to present our motorsports-inspired new USP Marine High Flow Air Intake Pipe for the 135-300 I4/L6 Verado engines. Following similar design elements as our 350-400 intake pipe, we added an additional CNC coupler on the filter side to provide venturi-like flow for the intake tract. The USP Marine High Flow Intake Pipe provides a significant flow increase (even more than the 350/400!) 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.

The USP Marine High Flow Air Intake Pipe for Verado Engines pairs well with our USP Marine Cowling High-Performance Air Dam for Verado Engines. These additions to your outboard provide a refined performance sound that many love on + off the water. Though the Mercury Verado is the quietest outboard on the market, they also are the most powerful. Boat owners nowadays are looking for that “sporty” addition to their outboard engines.

Replaces factory part #: 892383001 (Resonator)


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


  • Mercury Verado 4-Cylinder 135 
  • Mercury Verado 4-Cylinder 150 
  • Mercury Verado 4-Cylinder 175 
  • Mercury Verado 4-Cylinder 200 
  • Mercury Verado L6 200
  • Mercury Verado L6 225
  • Mercury Verado L6 250
  • Mercury Verado L6 275
  • Mercury Verado L6 300

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