SKU: 98474423010

Nitrous Express Nitrous & Water Injection Kit w/Billet LT4 Supercharger Lid w/12lb Bottle (20939BMF-12)

$2473.51 $2748.35
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Ships within 48 hours · Estimated delivery Aug 1 - Aug 6

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Description

Nitrous Express Nitrous & Water Injection Kit w/Billet LT4 Supercharger Lid w/12lb Bottle (20939BMF-12)This Billet LT4 Supercharger Lid replaces the upper supercharger lid on all GM LT4 Superchargers for a quick and clean install. Nitrous and fuel are injected into each cylinder from the side of the runner providing direct port like distribution ensuring maximum performance. This lid is made from a solid piece of billet aluminum with 1 8NPT machined directly into the plate so there is no need to worry about gaskets leaking. The nitrous system comes

This Billet LT4 Supercharger Lid replaces the upper supercharger lid on all GM LT4 Superchargers for a quick and clean install. Nitrous and fuel are injected into each cylinder from the side of the runner providing direct port like distribution ensuring maximum performance. This lid is made from a solid piece of billet aluminum with 1/8NPT machined directly into the plate so there is no need to worry about gaskets leaking. The nitrous system comes complete with billet aluminum and carbon fiber lightning solenoids, industry exclusive billet aluminum Lightning 500 bottle valve, stainless steel braided lines, stainless steel bottle brackets, wiring, switches jetting for 100 to 400WHP and every nut, bolt, and connector needed to install the system. The water/methanol system comes complete with billet aluminum and carbon fiber lightning water/methanol solenoids, high pressure electric pump, stainless steel hardlines, filtered nozzles, nickel plated fittings, composite reservoir, switches, NX stage 2 digital progressive controller that controls water methanol output, and every nut, bolt and connector needed to install the system.

Features:

  • High quality at an affordable price
  • Expertly made from premium materials
  • Built to match your exact requirements

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    Nitrous and Water/Methanol Instructions

     

     

    Shipping Notes
    • Free Standard Shipping on $100+ Orders to the USA.
    • Except Preorder products are shipped in 48 hours.
    • Delivery to the USA:
    1. Standard Shipping : 3-10 business days
    • If time is of the essence, please consider selecting expedited delivery for faster service.
    Exchange/Return Notes
    • We offer a 30-day return/exchange service after receiving.
    • Final sale items are not eligible for returns or exchanges.
    • To process your return/exchange, please contact us at [email protected]
    • Please click here for more details>>> Return & Exchange Policy
    SKU: 98474423010

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    4.5 ★★★★★
    Based on 20 reviews
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    H
    Verified Purchase
    Harold
    Phoenix, US
    ★★★★★ 5
    Pant perfect
    Size: 32, Color: White With White Strip, Size: 32, Color: White With White Strip
    Love this pant
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on March 2, 2026
    B
    Verified Purchase
    Bing
    Natrona Heights, US
    ★★★★★ 5
    Pleased Customer!
    Size: 42, Color: Red With Black Strip
    Perfect fit!
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on February 6, 2026
    B
    Verified Purchase
    B. Gross
    Fort Morgan, US
    ★★★★★ 4
    Reasonable quality, slightly small, definitely unhemmed
    Size: 42, Color: White With Black Strip, Size: 42, Color: White With Black Strip
    If these pants are the right look for what you want/need, they're a reasonably good quality option. But that said, in practice these looked a little "cheesy" with the black stripe. I can't say for sure that's a result of how the product is made/how it looks, but I just couldn't see myself wearing them. That's assuming I could wear them... In terms of fit, they were slightly small in the waist for both pairs I ordered. I'm not sure what I thought they meant when I read that they were unhemmed, but for those looking for pants to take out of the box and wear... these aren't for you. The ankles are not "finished" and require hemming to make them look acceptable. (This was my fault, so I didn't count off for this)
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on July 8, 2021
    C
    Verified Purchase
    Chiaro
    Bozeman, US
    ★★★★★ 3
    They stand out, and are flashy, but sizing is complicated.
    Size: 34, Color: Black With White Strip, Size: 34, Color: Black With White Strip
    High-quality pants and flashy. The stripe adds a lot of attention for reasons both good and bad. The materials they were made are excellent quality. Pants are thick, but not too thick, and are lightweight, guaranteeing easy movement. Comfortable - could wear these all day. I do love their appearance. They made me feel like a million bucks. :) The only problem is sizing and fit. I normally wear size 34 for waist in jeans and dress pants like these, but the 34 I got didn't fit at all - too tight. So, I ordered a 36, and it fit, but barely. When I sat down, there was too much tightness in my "masculine area". I also ordered a 38, and, well, they were just too big - practically hung off me. A 37 would probably work for me in these, but they don't offer such a size. I have to return the 34 and 38. Will keep the 36, see if I can have it altered in some way. Length was fine. Being 1.86 meters, often the length in these pants is a little on the short side. In the photo, I'm wearing size 36 and the black pair with the gold stripe, which is actually more of a flashy yellow. I liked how I looked in them, but they were a little too tight at times, the belt wasn't even necessary. It enhanced the outfit though, don't you think.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on July 20, 2025
    A
    Verified Purchase
    Anonymous For Now
    Los Angeles, US
    ★★★★★ 5
    Good as a standard "Tuxedo" pants
    Size: 42, Color: Black With Red Strip
    Red Striping could be wider. These are good as a standard "Tuxedo" pants but if you are looking more fore a "Security Guard" style pants the striping needs to be wider.
    WAS THIS REVIEW HELPFUL?YesReportShare
    Reviewed in the United States on April 18, 2025

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