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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
4.2 ★★★★★
Based on 1084 reviews
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Product Reviews
★★★★★ 5
High quality product
Size: Twin, Color: White
High quality!! It was exactly what I was looking for.
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Reviewed in the United States on June 3, 2026
★★★★★ 1
Broke nearly immediately
Size: Queen, Color: Walnut, Size: Queen, Color: Walnut
Terrible. Broke after a month or so of normal use. DO NOT BUY
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Reviewed in the United States on April 12, 2026
★★★★★ 5
Simple and not Drama claim process.
’ve had Asurion coverage for a couple of years and never needed to use it until recently, when my pool salt cell (less than two years old) stopped working. I had purchased it with an Asurion protection plan, so I contacted them to start a claim.
The process was simple and straightforward to follow. In the end, they honored the plan and covered the cost of my salt cell based on the value when I originally bought it. They issued me a gift card that I could use on Amazon for that amount.
While prices have gone up and a new cell now costs about $200 more, it was still definitely worth having the coverage. Overall, I’m satisfied with how the claim was handled.
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Reviewed in the United States on June 8, 2026
★★★★★ 5
Love this protection plan
Quick and easy. My daughter's cracked her screen on her phone, as soon as it happened I went on the app, filed the claim. Ten minutes later I received the email with the shipping lable. The following day I dropped the phone off at ups and 4 hours later I received the digital gift card. Ive filed several claims since getting the protection plan and with four kids its definitelysomething im glad to have especially since i dont have to buy a protectionplan for each item now. I have filed claims for electric scooter the stoped working for no reason, my son's phone stopped charging, my oldest daughter cracked her phone screen, my son's video game controllers up and died and each time it was quick and easy and no fuss
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Reviewed in the United States on May 13, 2026
★★★★★ 1
Don't waste your money - these people will not help you
On March 9th 2024, I purchased a MCombo Lift Chair costing $785. On the same day, through the same Amazon account (my PERSONAL account since I also have a business account), I purchased an Asurion Complete Protect policy at the cost of $16.99 per month plus taxes. About one month ago, a problem arose with the chair that required me to make a claim using the "Complete Protect" policy that I had purchased for that very item. The claim was initiated on January 1st, 2025 - On January 3rd, I received an email asking me for photographs showing the damage for which I was making a claim. I sent those photographs via email to the address provided on January 6th. On January 27th, having not received ANY response from Asurion, I contacted them via phone and was told that my purchase had been made with a business account, that it was being used for business purposes, and was therefore not covered. I assured the Asurion Representative that it was most certainly not a business use, and that the chair that I was claiming for had been purchased because I had extensive shoulder surgery done that made it impossible to get in and out of bed. After speaking (unsuccessfully) with the Asurion Rep, I then contacted Amazon Customer Service. I spoke with an Amazon Customer Service Representative on the phone who confirmed that I had in fact used my personal account to purchase the chair and the Asurion Complete Protect policy. That representative went on to send a message to Asurion on my behalf confirming that the purchase was for personal use and not business use. Asurion responded, asking me to call them with the order number for the Asurion purchase. The number I gave was the exact same order number on my order history, however, the Asurion Rep could not find it. I was finally able to discover that the order number in Asurion's system was entirely different and isn't even in the same format as an Amazon order number.
Upon the Asurion representative finding my plan, she informed me that the chair was listed as being purchased for business use (despite Amazon confirming that it was NOT) but that I should give them "a couple of business days" to resolve the issue. Five business days later, still no response and so I called them again (Yesterday - February 1st 2025)... Lo and behold, I got the same crap yet again... the purchase was listed as business use and was therefore being denied, but she promised to remove the business use commentary and put the claim through again.
Today, February 2nd, I called Amazon yet again to escalate and had to call THREE times because the first two calls resulted in me finally being connected to an Asurion representative (two different reps) and each time, the Asurion representative hung up the phone as soon as my name was mentioned.
It has become clear to me that the Asurion "Complete Protect" policy is a SCAM - they will NOT take care of your issue, regardless of how long you've been paying. I have been paying every month since March 9th last year - so they've received over $170 from me thus far, with zero other claims, and if I am able to cancel right now, I will only receive $16.99 back. All I want, is the chair that I purchased the policy for coverage of, to be repaired or replaced. Asurion are NOT helping, and are actively avoiding contact.
At this point, I am considering legal action against Asurion for fraud - perhaps even a Class Action. I'll wait and see if my issue gets resolved within the next 10 days or so.
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Reviewed in the United States on February 2, 2025