Best Wet Shot Nitrous Kit for EFI, Import and GM Setups

#1 · Best Overall

1. Nitrous Express Proton Plus

• Weight: 20 lb

Best for: Universal EFI single-stage option.

Why it ranks #1: Explicitly a wet, single-stage universal EFI system with a 35–150 HP range and 10-pound bottle, giving buyers clear fit and output details.

A wet, single-stage system with a 35–150-horsepower range gives universal EFI owners a defined spread of output choices. Its included 10-pound bottle provides the central capacity detail for planning a setup, while the single-stage format keeps the system focused on one selectable power step.

The universal EFI designation makes this a candidate for a range of EFI applications, rather than a kit limited to a named engine family. Its 35–150-horsepower range gives buyers several output levels to consider, and the single-stage layout keeps operation centered on one stage. The included 10-pound bottle is a substantial part of the listed package, so buyers can plan around that supplied capacity. The listing does not specify individual jets or installation hardware beyond the kit description.

Skip it if you need a listed output above 150 horsepower; the Ny-Trex Split-Shot Viper offers jets up to 400 horsepower.

This suits an EFI owner seeking a wet, single-stage kit with a 10-pound bottle and a stated 35–150-horsepower range. Check that your vehicle fits the universal EFI application; the listing does not detail specific installation hardware.

Listed on Amazon as: Nitrous Express Nitrous Oxide System, Proton Plus, Wet, Single Stage, 35-150 HP, 10 lb Bottle, White, Universal EFI, Kit

#2 · Highest EFI Range

2. Nitrous Outlet Quick Fix

• Weight: 28 lb

Best for: Concealed EFI bottle setup.

Why it ranks #2: Designed to add nitrous to EFI vehicles, with the description stating up to 200 HP; the 10-pound bottle and push-button activation are included.

An included duffel bag lets the Quick Fix kit conceal its 10-pound bottle, making storage the clearest differentiator for an EFI owner seeking a less visible setup. The package also lists a mounting plate and push-button activation, with a single-nozzle wet system for adding nitrous.

The duffel bag and mounting plate give buyers two named bottle-storage and mounting components to consider when planning where the system will sit. Push-button activation is described as simple, and the kit’s pre-wired activation is noted in the additional description, which can shape the control workflow. Its single-nozzle configuration and 10-pound bottle are explicit package details. The additional description says it can add up to 200 horsepower to just about any EFI vehicle; the listing does not specify jet steps or a narrower vehicle fit.

Skip it if you need a carburetor-specific kit; the NOS Powershot 05001BNOS is listed for a 4150 four-barrel carburetor.

This suits an EFI owner prioritizing bottle concealment, push-button operation, and a single-nozzle layout. The listing describes broad EFI use and up to 200 horsepower, but gives no jet-step breakdown or detailed vehicle-specific fitment.

Listed on Amazon as: Nitrous Outlet Quick Fix Wet Nitrous System (10lb Bottle)

#3 · Best GM Fit

3. Cold Fusion GM Wet Kit

• Weight: 24 lb

Best for: GM LT and LS engine fit.

Why it ranks #3: Specifically compatible with LT1, LS1, LS2 and LS3 engines, with included jetting for 100, 125, 150 and 200 HP shots.

Compatibility with LT1, LS1, LS2, and LS3 engines is the key advantage of this Cold Fusion wet kit, giving owners of those GM platforms a clearly identified application. Included jetting covers 100, 125, 150, and 200 horsepower, providing four stated choices within that fitment.

The named LT and LS engine compatibility narrows the fit question for owners of those platforms, while the four included jet levels let them choose among 100, 125, 150, and 200 horsepower. Stainless-steel braided hoses pair with a Pro Fogger nozzle and high-capacity solenoids, giving the package specified fluid-delivery components rather than only an output range. The listing calls it a complete kit, but does not enumerate every included fitting or installation step, so verify the package contents against your setup needs.

Skip it if you have a fuel-injected import rather than a listed GM engine; the Cold Fusion Nitrous Import Wet Kit names import applications.

Choose this for a listed LT1, LS1, LS2, or LS3 build seeking selectable 100–200-horsepower jetting and braided hoses. Its stated compatibility is specific to those GM engines, so other applications fall outside the supplied fit information.

Listed on Amazon as: GM Nitrous Wet Kit | Cold Fusion Nitrous | Compatible with LT1, LS1, LS2, LS3 | Adjustable up to 200HP | Complete Kit

#4 · Best Import Fit

4. Cold Fusion Import Wet Kit

• Weight: 24 lb

Best for: Fuel-injected import applications.

Why it ranks #4: Targets 1997-newer, single-throttle-body fuel-injected imports and includes 35–125 HP jetting, a 10-pound bottle and activation components.

Import-specific compatibility for fuel-injected 4-, 6-, or 8-cylinder engines gives this Cold Fusion wet kit a defined audience. Its included jets span 35 to 125 horsepower, while the 10-pound bottle, gauge, and bottle brackets provide several named components for planning the installation.

The stated import fit covers multi-point EFI or fuel-injected 4-, 6-, and 8-cylinder engines, with one throttle body specified in the title; buyers can screen their setup against those boundaries before choosing it. Five jet levels—35, 50, 75, 100, and 125 horsepower—allow selection within the listed range. A Pro Fogger nozzle, braided hoses, wide-open-throttle switch, gauge, brackets, and 4AN bottle nut are named in the package, helping buyers account for mounting and control components.

Skip it if you need a dual-throttle-body import application; the Ny-Trex Split-Shot Viper specifically lists dual throttle bodies.

This is a fit to consider for a fuel-injected import with one throttle body and a desired 35–125-horsepower range. Its listed engine-cylinder coverage and included bottle hardware are useful, but the one-throttle-body boundary matters.

Listed on Amazon as: Nitrous Import Wet Kit | Cold Fusion Nitrous | Compatible with Import Fuel Injected Engines 1997-Newer with 1 Throttle Body | Adjustable up to 125HP | Complete Kit

#5 · Best Universal Kit

5. NOS Universal Wet Kit

• Weight: 23 lb

Best for: Fogger nozzle distribution focus.

Why it ranks #5: A universal wet system with a 10-pound bottle, steel brackets, braided line and 75, 100 and 125 HP jetting.

The exclusive Soft-Plume Fogger nozzle finely atomizes fuel, a specific feature intended to improve nitrous and fuel distribution. NOS pairs it with 75-, 100-, and 125-horsepower jetting, a 10-pound bottle, steel brackets, and stainless-steel braided line for a universal wet-kit package.

The Soft-Plume nozzle’s fine fuel atomization is tied directly to the kit’s stated aim of distributing nitrous and fuel, making the nozzle the defining feature for buyers comparing delivery components. Three listed jet levels—75, 100, and 125 horsepower—give a bounded choice of output. The steel bottle brackets and stainless-steel braided line are named installation components, while the 10-pound bottle supplies the included bottle size. The listing calls the kit universal but does not identify specific engine types or fit limits.

Skip it if you need a listed jet below 75 horsepower; the Nitrous Express Proton Plus starts its stated range at 35 horsepower.

Consider this NOS kit if you want its Soft-Plume nozzle and one of three stated 75–125-horsepower jet levels. The universal description is broad, but specific engine compatibility is not supplied, so assess your application accordingly.

Listed on Amazon as: NOS 07006NOS NOS Universal Wet Kit Nitrous System

#6

6. Nitrous Express MainLine EFI

• Weight: 16 lb

Best for: Broad non-TBI EFI compatibility.

Why it ranks #6: Fits non-TBI EFI vehicles and provides 50, 100 and 150 wheel-horsepower options, plus a 10-pound bottle and stainless steel brackets.

Compatibility with non-TBI EFI vehicles from 1985 to the present gives this Nitrous Express ML2000 a broad, clearly stated application window. Its 50-, 100-, and 150-wheel-horsepower choices provide three listed output levels, while the 10-pound bottle and stainless-steel brackets define key supplied hardware.

The non-TBI EFI qualification and 1985-to-present range help buyers screen vehicle type and age against the stated fit, while excluding TBI systems from that description. Three wheel-horsepower levels—50, 100, and 150—offer a defined selection rather than an unspecified range. The included 10-pound bottle and stainless-steel bottle brackets support planning for bottle mounting, and the listed chrome fittings avoid brass fittings in this package. The listing does not specify nozzle type or a detailed installation procedure.

Skip it if you need a TBI-compatible kit; the Nitrous Express Proton Plus is listed for universal EFI applications.

This is a candidate for owners of non-TBI EFI vehicles from 1985 onward who want a 50–150-wheel-horsepower choice and a 10-pound bottle. TBI systems are outside its stated compatibility, so check that distinction first.

Listed on Amazon as: Nitrous Express ML2000 50-150 WHP MainLine EFI Single Nitrous System with 10 lbs. Bottle

#7

7. Ny-Trex Split-Shot Viper

• Weight: 23.6 lb

Best for: Dual-throttle-body high-output setup.

Why it ranks #7: Its dual-nozzle arrangement comes with jets from 150 to 400 HP, but the listed setup is for installation between a MAF and dual throttle bodies.

Two T-Rex injector nozzles are specified for installation between the MAF and dual throttle bodies, making this Ny-Trex system particularly distinct for that intake arrangement. Its supplied jets span 150 to 400 horsepower, with six listed levels for buyers considering a higher-output setup.

The two injector nozzles and their stated position between the MAF and dual throttle bodies give buyers a concrete intake-layout fit to assess before installation. Six jet choices—150, 200, 250, 300, 350, and 400 horsepower—provide a broad listed output range. A 660 bottle valve with gauge port is specified, while mounting hardware and electrical components such as relays, switches, and wire connectors are also named. These included items help buyers account for mounting and control work.

Skip it if you have a single-throttle-body EFI setup; the Nitrous Express Proton Series lists single-throttle-body compatibility.

This fits buyers with the specified MAF-to-dual-throttle-body arrangement seeking jet choices from 150 to 400 horsepower. Its nozzle placement is application-specific, so match the intake layout before choosing the system.

Listed on Amazon as: Ny-Trex Split-Shot Viper Dual Nozzle Wet Nitrous System

#8

8. NOS Powershot 4150

• Weight: 25 lb

Best for: 4150 carburetor-specific setup.

Why it ranks #8: The title specifies a wet system for a 4150 four-barrel carburetor, making it a targeted choice rather than a universal EFI option.

Compatibility with a 4150 four-barrel carburetor is the defining point of this NOS Powershot wet system, giving carbureted buyers a specifically named application. The supplied listing identifies the system and its black finish, but provides no jet range or component breakdown to guide output selection.

The 4150 four-barrel specification makes this a targeted choice rather than a broadly described EFI kit, so buyers can begin by matching the carburetor format. NOS identifies it as a Powershot wet system, establishing the system type and product family. However, the supplied features do not give horsepower levels, bottle capacity, nozzle details, or included hardware. That limited specification detail means buyers cannot use this listing alone to compare output steps or plan every part of installation and bottle mounting.

Skip it if you use fuel injection instead of a 4150 four-barrel carburetor; the Nitrous Express Proton Plus lists universal EFI compatibility.

This is relevant to a buyer whose setup uses a 4150 four-barrel carburetor and who wants a NOS Powershot wet system. The listing’s sparse specifications leave output range and included installation components unconfirmed.

Listed on Amazon as: NOS 05001BNOS Powershot Wet System for 4150 4-Barrel Carburetor – Black

#9

9. Nitrous Express Proton Series

• Weight: 0.01 oz

Best for: Compact single-throttle-body EFI.

Why it ranks #9: It is described for electronic fuel-injected single-throttle-body vehicles, but the supplied listing does not explicitly identify it as a wet kit.

A compact, easy-to-mount module paired with stated compatibility for electronic fuel-injected vehicles with a single throttle body gives this Proton Series kit a clear fit. Its solenoids are rated for up to 250 horsepower to the wheels, and the included bottle is 10 pounds.

The compact module and easy-mounting description can simplify placement planning in a single-throttle-body EFI vehicle, while the stated compatibility gives buyers a specific application boundary. The solenoids are capable of producing 250 horsepower to the wheels, which establishes the listed capability without specifying individual jet choices. A black anodized aluminum housing pulls heat away from the solenoids for durability, according to the supplied features. The 10-pound bottle is included; the listing does not detail other package components.

Skip it if you have a carbureted or dual-throttle-body setup; the NOS Powershot 05001BNOS is specified for a 4150 four-barrel carburetor.

This suits a single-throttle-body EFI owner seeking a compact module and solenoid capability stated at 250 horsepower to the wheels. Its application boundary is explicit, and the listing does not identify jet levels or additional package hardware.

Listed on Amazon as: Nitrous Express – Proton Series Nitrous Kit w/10lb Bottle (20420-10)