454 Mag MPI MEFI3 Serp 99-02 Stg 1 Polish


Mercruiser 454MAG MPI, Stage 1 kit

Year: 99-02
Stock HP: 385
I/C: IC-2 Core.  8" Cupronickel

Finish: Polished


Belt Type: Serpentine

V-belt equipped engines require 2.25” in forwarding clearance.

Prop65 Warning Icon

WARNING: Cancer and Reproductive Harm – www.P65Warnings.ca.gov


The looks are only part of the package; the performance will put an ear-to-ear grin on your face. Because of the unique twin-screw SC design, the Whipple Charger can generate full boost at any rpm, just the touch of the throttle and you have instant power. Roll into the throttles and feel the g-forces push you back in your seat while the sound of an F-16 fighter jet comes to life. You’ll turn your once docile boat into a pure adrenaline rush while putting other boats in their place when they “attempt” to run by you.


  • Up to 50% horsepower increase
  • Reprogrammed ECM for complete engine management including fuel, spark and detonation protection
  • Instant boost, no lag as does centrifugal's
  • Cupronickel intercooler for complete corrosion resistance
  • Heavy duty intercooler design for increased durability and reliability
  • Throttle body injection creates liquid intercooler for even lower air temperatures, increased power, and reliability
  • Ultra efficient 3.3 Liter axial Whipple Charger
  • Flat torque curve across wide RPM range
  • Completely self-contained oiling system
  • Most efficient supercharger on the market
  • Easy to install without internal engine modifications
  • Supercharger has lowest noise level in industry
  • Black powder coating and anodized pieces
More Information
Model WHP WMK-5114P
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