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USP Marine Tuning MAX+ Performance Top Cowling For Verado L6 Engines

USP Marine Tuning


  • $699.99 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)).

The USP Marine MAX+ Performance Top Cowling sets the bar for Verado engine styling + performance. Manufactured in the USA, we utilize motorsports-inspired injection molding to create a durable, yet light material for your outboard engine. We scanned the Verado engine cowling to provide laser accurate fitment. Manufactured using extremely strong material known for its light-weight, superior durability, and impact resistance - making it perfect to withstand the hazards of daily boating + fishing. With over 20+ years of tuning forced induction engines, we understand what it takes to create the optimum environment for boost. Keeping temperatures down and air flowing is what fuels these engines. With an over 50%+ increase in ram air introduced in the engine, we can provide the engine with lower intake air temperatures. During WOT throttle, especially in the hotter months, this has proven to retain 2-3MPH on top-end performance. 
Alongside performance, the motorsports-inspired design adds an aggressive look to your Mercury Verado engine. Stand out from the crowd with the USP Marine MAX+ Performance Top Cowling. 
Alike many boat owners in the saltwater environment, corrosion plays a role in our day-to-day boating experience. The introduction of the forced induction to the marine environment adds an extra element of care when it comes to your engine. As active fishermen, we understand this hurdle. All USP Marine MAX+ High-Performance Air Dam comes with two SaltShield screens which provide a fine mesh screen to block water from entering your engine. We also include a “block off” plate for extreme scenarios such as high-speed wahoo trolling or billfishing in rough weather. 

This is a direct replacement for OEM part # 885354T01

Fits The Following Engines:

  • Mercury Verado L6 200
  • Mercury Verado L6 225
  • Mercury Verado L6 250
  • Mercury Verado L6 275
  • Mercury Verado L6 300
  • Mercury Verado L6 350
  • Mercury Verado L6 400M
  • Mercury Verado L6 400R


  • Increased Airflow
  • Includes 8 stainless steel marine grade screws for optimum fitment
  • Surface prepped with an adhesion promoter type of primer for ease of paint applications or further prime coating. 
  • Refined performance sound, made to be paired with USP Marine Air Intake Pipe
  • Includes multiple 120-micron Hydro-Salt Shield screens for rough water intrusion applications
  • One solid block off plate also included for extreme applications
  • Race-inspired F1 profile design for an aggressive look
  • Replaces the factory cover screws with corrosion-resistant stainless screws. 


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