Product Detail


Do you want to own the most powerful V6 outboard on the planet?

The first of its kind in the world, the Nizpro 450s Supercharger Kit will turn your Yamaha 4.2 V6 250 OFFSHORE into a 450hp Beast!! Get maximum power with minimal weight gain. Your engine will now produce 450hp, rev to 6,600rpm and have an average of 25% more torque than a Yamaha F350 V8!

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Look what’s cooking!!

Activate “Beast Mode” on your rig with this easy recipe:

  • Add 1 * Nizpro 450s ECU Flash
  • Add 1* Nizpro 450s Supercharger kit
  • Get your boat to the water and prepare to have your mind blown… (now that your engine is also!!)

Described in a boat test article as both spellbinding and brilliant,  the Nizpro 450s Yamaha V6 will give you the incredible confidence in your rig. With its quiet brutal performance, powerful acceleration and improved fuel efficiency at normal cruising speeds, you need to think of it as having the torque of a diesel and the responsiveness of a petrol engine, and it all weighs in at over 150kg lighter than Yamaha’s 425hp petrol V8.

A Nizpro 450s Supercharged engine is ideally suited to use in boats looking for range, ability to haul decent mass, and ease of operation for prolonged periods of time. It delivers real world punch at suitable revs and will drink only as it needs, which is pretty miserly considering the performance you get. It is also quieter, by virtue of not having to work anywhere near as hard to get you where you want to go.

What about Value for Money?

Compared to running twin 250hp Yamaha V6 outboards, the Nizpro Marine Supercharged 450s Yamaha is over 200kg lighter with no additional drag through water and has no additional ongoing 2nd motor service costs!

Easy to install in under 4 hours, your Nizpro 450s kit comes complete with comprehensive  instructions where no additional parts or fabrication are required. Do it yourself OR have your marine technician do it for you!

Please note that all NIZPRO ECU Flashing Software is ONLY compatible with Windows Computers.


  • Power increase up to 450hp
  • 25% improved average torque over Yamaha F350 V8
  • RPM limiter increased from 5,750rpm to 6600rpm
  • Improved general use fuel economy
  • OEM Eaton TVS 1900 Supercharger rotating assembly
  • Fits under standard engine cowl (with supplied spacer kit)
  • Engineered & packaged for plug and play fitment.
  • Exclusive 12 months Nizpro Supercharger warranty

Supercharger Kit includes:

  • ECU Interface, USB Cable & Power Cable
  • SHO Flash Harness & Engine Flash Tune
  • Nizpro USB preloaded with Full Instructions
  • Nizpro Supercharger kit with all fittings and fixings
  • Nizpro 450s pulley, belt and water pick up pipe
  • Nizpro 450s Cowl spacer and bracket kit
  • Nizpro 450s Air intake
  • Pre assembled Nizpro water filter system, ready 2 fit
  • Nizpro 450s Supercharged Decals
  • Nizpro 450s Intercooler drain kit ( only applicable to Cold Climate usage)

Suitable for Yamaha F250 4.2 V6 OFFSHORE          2008  to Current model.