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Description
XForce | Dual 3" Varex Universal Valved Muffler | 304 Stainless Steel Oval | VMK31-300XForce Dual 3" Varex Universal Valved Muffler VMK31 300 Make it loud, make it quiet, make it yours. The XForce VMK31 300 features our patented Varex valved technology, providing enthusiasts with the ultimate exhaust solution. This universal muffler allows you to switch between a civilised, stock like sound and a wide open performance note at the touch of a button. Proudly Mandrel Bent and crafted from premium 304 Stainless Steel, this dual in, dual
XForce Dual 3" Varex Universal Valved Muffler - VMK31-300
Make it loud, make it quiet, make it yours. The XForce VMK31-300 features our patented Varex valved technology, providing enthusiasts with the ultimate exhaust solution. This universal muffler allows you to switch between a civilised, stock-like sound and a wide-open performance note at the touch of a button. Proudly Mandrel-Bent and crafted from premium 304 Stainless Steel, this dual-in, dual-out muffler is the perfect centerpiece for high-horsepower custom exhaust builds.
What's in the Box?
- Dual 3" Varex Universal Muffler
- Pre-installed Internal Valve & Actuator Motor
- 2 x Wireless Remote Key Fobs
- Control Module & Wiring Harness
Note: This is a universal component for custom fabrication. An X-pipe or Merge-pipe MUST be installed upstream of this muffler for optimal performance. Ensure a 2-inch clearance for the actuator motor during fitment.
Features:
Engineered for maximum versatility and sound control, this muffler offers the following features:
- Patented Varex Valve: Manually toggle between Closed, 25%, 50%, 75%, and Fully Open positions to suit your environment.
- Dual 3" Configuration: High-flow twin 3-inch (76mm) inlets and outlets with 2-bolt flanges for secure connection.
- Smartbox Compatible: Upgradeable to Smartbox control for smartphone app integration, geo-fencing, and automated valve modes.
- Premium 304 Stainless: Full 304-grade stainless steel construction for superior durability and a high-lustre finish.
- Compact 6"x10"x15" oval body designed for easy integration into various chassis types.
Specifications:
- Part Number: VMK31-300
- Material: 304 Stainless Steel
- Inlet/Outlet: Dual 3-Inch (Flanged)
- Body Dimensions: 6" x 10" x 15" Oval
- Control: Electronic Remote (Wireless)
- Required Upstream: Merge-pipe or X-pipe
Important Information
- The image shown may not reflect the actual product
- Shipping times may vary depending on destination and stock availability
Vehicle Applications:
| Make | Model | From | To | Body | Series | Engine | Variant | Drivetrain |
|---|---|---|---|---|---|---|---|---|
| Universal | Custom Fabrication | Any | Any | Any | N/A | Any | Custom Build | Any |
Warranty Information
| Product Type | Warranty Period |
|---|---|
| 304 & 201 Stainless Steel Exhaust Systems | 60 Months |
| Accessories | 12 Months |
| Catalytic Converters | 12 Months |
| Electronic Products (Including SmartBox) | 12 Months |
| Mild Steel & 409 Stainless Steel Exhaust Systems | 24 Months |
| Mild Steel Headers | 12 Months |
| Stainless Steel Headers | 24 Months |
| Universal 304 Stainless Steel Mufflers | 24 Months |
| Universal Mild Steel & 409 Stainless Steel Mufflers | 12 Months |
Payment & Security
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Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- 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
4.1 ★★★★★
Based on 946 reviews
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Product Reviews
★★★★★ 5
Takes a Licking and Keeps on Ticking
Color: Green/Black
I love this watch despite the fact that it is really a toy. I love the look of the watch, I love how lite the weight of the watch is on my wrist, and it really does keep good time if you manage the solar charge properly. Other than looking cool on your wrist, this watch has absolutely no functions other than time keeping. The black plastic bezel is molded into the case and does not turn, so don't plan on using that. The watch has no light, the dial numbers are non-luminous and the hands are very limited in terms of luminosity. No buttons. All you can do is adjust the time and date by pulling out what used to be a winding stem in the good old days.
The small tag on the strap with Geographic coordinates shown on it indicate the location of the old Timex manufacturing facility (SW of Waterbury, CT).
I have a nice ledge at my bedroom window and it gets good western sun for a good part of the day regardless of the time of year. On this ledge you will find a half dozen solar powered watches (mostly Casio) properly aligned to maximize the charge they may receive each day. Note that the description for this Timex watch specifically states that a lightbulb won't charge this watch. You need direct sunlight for several hours if you want to get more than a 3-week charge into this watch.
So, I'll leave you with a couple of tips, my friends; 1.) If you are looking for a first watch to give your outdoorsy oriented Son or Daughter, then give them this one. Why? Because it is cool looking, fairly well built, and it actually works, 2.) After you receive your Timex watch, be sure to keep the display mount it is packaged with. It makes a great fixture to mount your watch on for charging and allows you to maximize the position of the solar cells on the dial so that you can optimize charging time.
Have Fun!
Jimmy
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Reviewed in the United States on February 28, 2026
★★★★★ 5
Excellent value, flawless performance for well over a year and no signs of quitting.
Color: Green/Black
Excellent value, had this for well over a year and it still keeps perfect time, still water resistant.
No worries about having to change batteries.
Owned a fancy expensive (battery) watch once and the dept. store repair intentionally sabotaged the watch in the hopes I would purchase another from them. Yeah, good luck with that, lost my business forever.
This is the 21st century, cell phones are the new time pieces, but solar is totally reliable and Timex makes it happen.
Holds a charge for many months, although I prop it in a bright window for a few days every few months or so just to make sure the cells are always fully charged, although it's probably unnecessary, just being over cautious. I haven't actually experienced this watch ever running out of power even after months of use. Damn impressive, as it should be.
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Reviewed in the United States on October 12, 2025
★★★★★ 4
Good value for solar watch
Color: Black/Orange
Nice watch! It is plastic like but it is solar. No indiglo button only a little luminous on the hands so you don't want to wear it in tje dark and expect to check the time. 45mm case is good size for my wrist and the band works good also, Not too long not too short. Overall a good watch with no problems
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Reviewed in the United States on May 6, 2026
★★★★★ 5
Amazing Solar for the price
Color: Black/Orange, Color: Black/Orange
Great watch. Very good visibility. Ligh and feels quality. Easy to swap straps. Same size as my Casio Duro. Highly recommend.
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Reviewed in the United States on April 30, 2026
★★★★★ 1
Do not buy
Color: Green/Black
Do not buy. When I received the watch it did not work and the battery was dead. I bought a new battery and it killed that one as well after about a month.
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Reviewed in the United States on March 18, 2026