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Pro-Series BD4 - 250 BHP Dry Motorcycle Nitrous Kit

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Availability: In stock


Quick Overview

The Pro-Series BD4-250 is a ‘dry’ system designed specifically for 4 cylinder, fuel injected competition bikes and manufactured to the highest possible standards.  

Wizards of NOS Pro-Series BD4 250 bhp bike dry nitrous kit

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  • Wizards of NOS Pro-Series BD4 250 bhp bike dry nitrous kit


Wizards of NOS - Pro-Series BD4-250 - Dry Motorcycle Nitrous Kit

The Pro-Series BD4-250 is a ‘dry’ nitrous system that is manufactured to the highest possible standards and designed specifically for 4 cylinder, fuel injected competition bikes. The unique concept behind the Pro Series BD4-250 makes it the most advanced and most effective direct port dry system on the market, capable of increasing engine power by up to 250 HP.


The distinctive features of the Pro-Series BD4-250 are;

1)    Its unique use of Y-Blocks rather than a rail or shower heads to achieve perfect distribution.

2)    Its unique nitrous Discharge Tubes, which eliminate the drawbacks of nozzles and when mounted correctly act as air amplifiers and increase the airflow into the  engine along with the nitrous.

The Pro-Series BD4-250 offers;

1)     Superior performance at a very competitive price

2)     Peace of mind due to reliably and effectively delivering the exact volume of nitrous oxide required, when required.

No other system offers such a desirable combination of ease of fitting, advanced technology and superior performance. This system benefits from all the unique and high quality features expected of a high end WON nitrous system.

Independent tests have proven that our Pro Series BD4-250 will outperform any other direct port kit on the market bar none, whilst being more engine friendly.

The WON design team put a great deal of thought into creating the Pro Series BD4-250 system, to ensure it delivers the best for you and your bike. If want up to 250 extra HP and the most advanced injection design available, why search further, only to find a more difficult to fit and less effective system, when you’ve already found the best?

Containing the same Pulsoids as used on Cecil Towner’s world record destroying 6 second Pro Street bike, ridden by Ryan Schnitz  


· Lifetime Warranty on all components.

· Anodised billet alloy Pulsoid that will never wear out, guaranteed.

· Anodised billet alloy bottle valve. 

· Anodised billet alloy Y-Blocks.

· Medical grade stainless steel Nitrous Discharge Tubes.

· Polished stainless steel component mounting brackets.

· 24/7 tech support.


*Although the picture/s may not be an exact representation of the actual system, the parts list below is 100% accurate. We are out of stock of the 2.5lb bottle pictured, so the system will now be supplied with a 20oz bottle.

Parts Included:

  • 4 x Nitrous Discharge Tubes
  • 10 x 4mm Nuts & Olives
  • 2 x Billet alloy Y-Block – 5 - 4mm
  • 1 x Billet alloy Y-Block – 5mm
  • 1 x 2" length of 5mm SS nitrous supply tube from Pulsoid to Y-block
  • 3 x 5mm Nuts & Olives
  • 1 x X-10 250 hp Pulsoid (nitrous ONLY)
  • 1 x 2" length of 4mm SS nitrous supply tube from Y-block to Y-blocks
  • 1m of 4 AN braided nitrous supply hose with fittings (not shown in picture)
  • 1 x 20oz nitrous bottle with billet alloy 'mini' MaxFlow valve
  • 1 x Stainless steel bottle brackets
  • 1 x Arming switch w/ aircraft style cover
  • 1 x Electrical connectors & wire pack
  • 2 x Nitrous metering jets (appropriate sizes)
  • Fitting instructions & stickers.


N.B. Being a ‘dry’ system the customer is responsible for ensuring the ‘essential’ additional fuel is added to the engine for optimum performance and reliable results.  



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Yours Sincerely, The Wizards of NOS Team