Direct-Port Nitrous for EFI
Looking for the most bang for your buck? Try on a direct port nitrous kit for your late model EFI motor. Although a bit more complex and pricey than a traditional plate or fogger kit, the benifits of direct-port nitrous kits are well worth it in the end.
Photography by Henry De Los Santos

Installing the NXL system is easy, straightforward, and requires very little time. Route t
Engine Specs
Heads: Factory cast iron E7TE, 1.72/1.46-inch intake/exhaust valves
Cam: Crane Cams hydraulic roller, 220/220 degrees duration at 0.050-inch lift, 0.498/0.498-inch lift
Induction: GMS 80mm mass air meter, Accufab 65mm throttle body, Ford Cobra upper and lower, ACCEL 24-pound injectors
Piston: Stock forged aluminum
Rods: Stock
Crank: Stock
Exhaust: 15⁄8-inch shorty FRPP headers, 21⁄2-inch cat-pipe and tubing
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Next, place the supplied billet aluminum spacer onto the lower manifold for added clearanc
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Finally, insert both the nitrous and fuel jets in the proper housing (NX suggests starting
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The factory's large-diameter TFI distributor caps interfere with the new location of the f
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Attach the supplied "short" AN-4 line to the factory's Schrader valve to supply the additi
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We mounted the purge solenoid under the factory cowling as it allowed us to route the purg
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Wiring a nitrous system is usually simple, but when trying to integrate a multitude of acc

The three-button control panel features five separate functions. Pressing button A to the
Hot Tips for Peak Nitrous Performance
- Always read the manufacturer's instructions
- Make sure you have an adequate fuel system
- Use a bottle heater to maintain proper bottle pressure between 900 and 1,050 psi
- Install non-platinum spark plugs one to two heat ranges colder than stock. Platinum plugs create a smaller flame and the spark can easily get blown out.
- Only engage the nitrous system at wide-open throttle
- Never engage the nitrous system below 2,000 rpm
- Prevent contaminants from entering the nitrous and fuel lines during jet changes by having clean hands and a clean work area
- Only use premium fuel with a fuel additive like NX's Chemical X (PN 16003)
- Use quality plug wires and an aftermarket ignition with 150-plus-horsepower nitrous shots
By Henry De Los Santos
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