Monster Valve Flat - KMC Edition - Rapid Tire Air Up and Air Down Kit

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  • Regular price $190.25

Out of stock until January 15. Orders with this part will be backordered and held until the full order can be completed. 

The Monster Valve Flat - KMC Edition (or MV-Flat, formerly MV4) packs incredible inflation and deflation speeds with a foolproof install process. Monster Valves are over sized, light-weight, yet strong valve stems that you install as a second stem to your wheel. Made from 7018 aluminum, they are the fastest tire deflation and inflation product on the market. 

Imagine airing down a 40"x13.5"x17" tire from 35 psi down to 10 psi in under 30 sec. This kit also includes a Monster Chuck which, when used with a Power Tank, will inflate that same tire in 40 sec. 

These Monster Valves have been engineered with KMC Beadlocks with dual valve stems in mind. They simply drop into one of the stock holes and the rubber grommet is tightened from the back using the included Monster Key. There are no modifications to the wheel. Unlike the Monster Valve Tap, these can not be installed with the tire mounted but, because you do not need to tap or drill into your wheel, the install is much easier. 

We worked directly with Alpha Equipt to ensure their xCommander Beadlock wheel is MV-Flat Compatible. Innov8 racing can also add a Monster Valve mounting location upon request. 

With an all aluminum construction the total weight of each valve is a mere 1.6 oz. and does not require a tire rebalancing. Due to its construction, it is 5 times stiffer than a standard metal valve.

Because the Monster Valve is a secondary valve stem, you retain your TPMS sensors on your OEM valve stems. 

We recommend adding a tire pressure gauge with a large, easy to read face to get accurate readings while you're airing up and down. You'll thank yourself when you see how quickly the pressure drops. 

Save 10% on a tire pressure gauge when you bundle with your monster valves! We recommend adding a Tire Pressure Gauge (TPG) with a large, easy to read face to get accurate readings while you're airing up and down. You'll thank yourself when you see how quickly the pressure drops. If you option your Monster Valves with a TPG, we'll include a free EVA Case! ($22 value)

View our Monster Valve gallery of installs here. 

Note: Fits only KMC Beadlocks with dual valve stems as standard. The KM444 Mesa Forged does not work at the time of this writing. When installing in a KM236 Tank, rotate the beadlock ring to increase clearance for the Monster Chuck. We have not tested all models and fitments and some material may need to be taken out of the beadlock ring for Monster Chuck access such as on the KM237 Riot with -12 offset. 


  • 7018 Aluminum body
  • Aluminum Collar and Cap
  • Sold as set of 4 or 5
  • Monster Chuck included for inflating
  • Single Monster Valves can be found in a separate listing
  • Monster Key used for install is included
  • Add a Tire Pressure Gauge and we'll include a free EVA case! ($22 value)

User Note: When finished airing down, screw the red collar down until air flow stops or screw down fully and back out 1/8-1/4 rotation to properly seat the o-ring and prevent leaks.

Warranty void if used with balancing beads. 

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