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SB250D4 - 4 Cyl Direct Port Diesel Car Nitrous Kit

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Quick Overview

The Street-Blaster 250D4 is a direct port, dry, nitrous only system that has been designed specifically for 4 cylinder diesel applications. 

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SB250D4 4 Cyl Direct Port Diesel Car Nitrous Kit

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  • SB250D4 4 Cyl Direct Port Diesel Car Nitrous Kit



The Street-Blaster 250D4 is a frequent choice for diesel engines and benefits from numerous unique features as standard equipment, which offer substantial advantages over all other brands of nitrous systems.

The Street-Blaster 250D4 is a dry, nitrous only direct port system that has been designed specifically for 4 cylinder diesel applications. 

We at WON have extensive knowledge specific to diesel applications that we’d like to share with you;

1) The latest additions to WON nitrous systems mean that diesels are now even more suited to nitrous injection.  

2) Our latest system designs and enhancements to existing systems mean they are even easier to fit to diesel engines than ever before.

3) A very important aspect of nitrous injection on diesels, is that it is impossible for an incorrect fuel/air ratio, to damage the engine by running lean or due to detonation.

4) Being so robust, diesel engines are far more capable of handling greater power increases than the equivalent petrol engine.

5) As diesel engines don’t rely on a spark ignition, they are not at risk of spark failure, so what is normally the first limiting factor of a petrol engine will never be an issue.  

Modern diesels give outstanding fuel economy, but they are more limited than petrol engines, in how much extra power they can be tuned to make, using conventional means. However, by fitting a WON nitrous system, you can enjoy the best of both worlds – economical normal day to day running with a major power boost available at the flick of a switch.

A diesel engine requires a dry nitrous system, but additional fuel must still be available for combustion with the nitrous, in order to see an improvement in performance. The fuel is normally and simply added via the cars own fuel injection system. In order to reap the full benefit of the SB250D4 you will need a remap which significantly increases the fuel flow. An alternative to the traditional remap is a switchable tuning box (such as those supplied by WON) which can be switched to deliver more fuel when the nitrous system is activated, allowing the user to achieve the higher power levels with the nitrous system.

The Street-Blaster 250D4 has the potential to increase the power of your engine by up to 250 horsepower. However, each engine's power output capabilities and total power achievable can vary depending on many factors.

Click here for a comparison of WON vs other brands.

UNRIVALED list of standard features;

  • Lifetime Warranty.  
  • Anodised billet alloy Pulsoid.
  • Pulsoid that NEVER wears out, guaranteed.
  • Extruded alloy bottle bracket.
  • Anodised billet alloy bottle valve body.
  • Anodised billet alloy valve handwheel.
  • Stainless steel fittings.
  • Polished SS component mounting bracket.
  • 24/7 tech support. 

    Parts Included:
  • Our famous billet alloy X-10 250hp Nitrous Pulsoid with SS fittings and laser cut mounting plates.
  • Metering Jets (3 initial jets that range per application).
  • 1 x 5 lb. bottle w/ maxflow valve(bottle shipped empty).
  • 1 x Extruded alloy bottle bracket w/ stainless steel straps.
  • 1 x Throttle microswitch w/ bracket. TPS available for an extra charge.
  • 5M of 4AN braided hose supply line.
  • 2M of 4mm nylon supply lines from Showerhead to Injectors.
  • 2" of 4mm SS tube from Pulsoid to Showerhead 
  • 11 x 4mm nuts and olives
  • 4 x Venom injector (with spacer & retainer).
  • 1 x 4 Way Showerhead with 4mm I/L adapter.
  • 1 x Arming switch w/ aircraft style cover.
  • 1 x Electrical connectors & wire pack.
  • Fitting instructions & stickers.


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Yours Sincerely, The Wizards of NOS Team