Direct port injection delivers perfectly balanced octane benefits to each cylinder. If your high-output engine is equipped with a big turbo, or if you're on the ragged edge with an overboosted K03/4, you'll realize serious gains. Turn up the boost and advance ignition timing with supreme confidence. Run a 100 octane file on even weak 91 octane gasoline.

USRT direct port on Audi TT 1.8T 20v

USRT has promoted dual nozzle mounting since innovating the setup over ten years ago. As we've made common knowledge, this is the simplest way to achieve both intake cooling and significant octane boost. However, distribution is never perfect from the post-throttle nozzle.

Even the tiniest spray droplets have mass. Inertia carries more of these particles to the cylinders farther away from the throttle. Delivery is unbalanced. When the post-throttle nozzle is small (e.g. 60cc), the variance is not large. However, with larger nozzles, it becomes a more critical issue. Aggressive tuners are often frustrated by insufficient protection "here" and a combustion-quenching oversaturation "there". The only safe response is to dial back the boost/spark timing to satisfy the most vulnerable chamber.

Meanwhile, direct port guarantees that each cylinder receives exactly the same spray volume.



Because the mist is emitted so close to the engine, our Tuner's Pressure Gauge is supplied so as to dial in the exact amount required. -not more and not less.

Nozzle information:
USRT manufactures these nozzles in-house because nothing else on the market works as well (if at all). From existing market options, flow rates are simply too high and atomization isn't fine enough to flash evaporate. Our technology makes direct port injection effective in high-strung small displacement engines.

Please contact us for help to coordinate nozzle sizes, especially if a post-intecooler nozzle will be used with the direct port system. The stakes are high when pushing this hard. Trial and error guesswork with flow rates is unwise when our our tech experts can help you get it right from the very beginning.




Product Image Item Name- Price
MOD4 Direct Port System

MOD4 Direct Port System

Perfect your octane delivery and put racing gasoline expense behind you. Mist distribution is guaranteed so that no cylinder is overloaded or...


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MOD6 Direct Port System

MOD6 Direct Port System

Perfect your octane delivery and put racing gasoline expense behind you. Mist distribution is guaranteed so that no cylinder is overloaded or...


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End Cap Section

End Cap Section

Made of anodized billet aluminum, the End Cap Section fits on the feed and far sides of your block assembly. It's dowel-pin aligned, o-ring...


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Filter Section

Filter Section

Made of anodized billet aluminum, the Modular Filter section is dowel-pin aligned, o-ring sealed, and equipped with a 40-micron element.


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Port Section1

Port Section1

Made of anodized billet aluminum, the Port Section1 is dowel-pin aligned, o-ring sealed, and supplied with surface flush 1/4" push connect...


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Port Section2

Port Section2

Made of anodized billet aluminum, the Port Section1 is dowel-pin aligned, o-ring sealed, and supplied with no fittings. Outlet holes are 1/8"...


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Direct Port Holder

Direct Port Holder

These anodized nozzle holders feature 1/8" NPT threads and are compatible with USRT direct port nozzles. The push connect fitting takes a...


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BigUPPER K03

BigUPPER K03

FLOW MORE FROM YOUR TINY K03 TURBO: Hot air takes up more space than cold air. By cooling it inside the compressor, the amount space used drops and...


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AEM Water/Methanol FAILSAFE Device

AEM Water/Methanol FAILSAFE Device

Actively Monitors ENTIRE Flow Curve to Prevent Engine Damage Delivers Complete Peace of Mind If Your Water/Methanol System Experiences a Failure For...
$249.00

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Boost Trigga

Boost Trigga

Looking for a simple and dependable way to activate your direct port or pre-compressor water methanol injection system? Or, perhaps you'd like to...
$60.00

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