


Nitrous Express 8 Cyl Dry Direct Port Dual Stage 4 Solenoids Nitrous Kit (200-600HP) w/15lb Bottle
Marsoni
M251S
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Friday, May 29
Nitrous Express 8 Cyl Dry Direct Port Dual Stage 4 Solenoids Nitrous Kit (200-600HP) w/15lb BottleThis dual stage NX Dry Direct Port System provides nitrous directly into each cylinder through two sets of high flow NX Dry Nozzles. This system is designed to be used with an engine management system that can add nitrous enrichment through the engine's fuel system. A jet card with lbs. hr. flow data for each horsepower setting is provided to aid in tuning your engine management systems nitrous enrichment settings. Includes four billet aluminum and
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4.8 ★★★★★
Based on 1667 reviews
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Product Reviews
★★★★★ 5
Spark-tacular Revival for My Lawn Chariot
Ordered this OEM 2-pack of Champion spark plugs (Kohler 25 132 23-S / 2513223S) for my Kohler Command K OHV 7000 series (KT725) engine, and let me tell you—these little lightning bolts mean business.
Installation? Easier than pretending I’ll read the whole owner’s manual. Pulled the old plugs, threaded these pre-gapped beauties in, torqued appropriately, reconnected, and boom—instant ignition enthusiasm. The engine fired up like it had just downed a double espresso.
It’s still too early in the season to mow, but I couldn’t resist a test run. Converted the tractor mower into a full-blown leaf-blasting machine and sent it down my 1/10-mile driveway like a suburban hurricane. Leaves scattered. Neighbors stared. Power was smooth, responsive, and downright smug.
Idle is steady. Throttle response is crisp. No sputter, no hesitation—just clean, confident combustion. Exactly what you want from OEM-spec plugs.
If your tractor’s been sounding like it’s negotiating with itself before starting, do it a favor. These plugs brought mine back to “runs like a champ”… which, given the name, feels poetically correct.
Five stars. Lawn domination pending.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on February 16, 2026
★★★★★ 5
Amazon makes it so easy
Perfect fit, exact replacement part.
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Reviewed in the United States on May 13, 2026
★★★★★ 5
Reliable and well priced
Works very well in my Cub Cadet XT1
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Reviewed in the United States on May 20, 2026
★★★★★ 5
Installed them works good.
Value for the money.
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Reviewed in the United States on March 10, 2026
★★★★★ 5
Good Plug if you need this model
These are the OEM for Kohler 7000 series I did service on. They needed to be gapped but that’s every spark plug.
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Reviewed in the United States on May 19, 2026
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