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Flowmaster 42510-FM FlowMonster 1-Chamber Muffler Center In/Center Out: 2.500 in

Flowmaster 42510-FM FlowMonster 1-Chamber Muffler Center In/Center Out: 2.500 in

SKU: 42510-FM
Regular price $35.36 USD
Regular price Sale price $35.36 USD
Sale Sold out


chambered mufflers. Hidden beneath your ride lies a powerful creature destined to dominate. FlowMonster™ chambered and straight through style mufflers create an aggressive exhaust note giving a powerful voice to your car/truck/SUV. FlowMonster mufflers are constructed of 16-gauge aluminized steel and 409 stainless steel and are 100% MIG welded for maximum strength and durability. The chambered design cancels out unwanted frequencies with no packing producing an aggressive exhaust note that will not change with time. FlowMonster chambered mufflers are coated with high heat-resistant silver paint for an aggressive look under your car.

  • Produces an Aggressive sound
  • 1-Chamber Internal Design Cancels out Annoying High Pitch Frequencies
  • Increases Exhaust Flow for Increased Performance and Excellent Throttle Response
  • Constructed of Durable 16-gauge Aluminized Steel
  • 100% MIG Welded for Maximum Strength and Durability
  • Silver Painted Finish
  • Compact Design Accommodates Most Cars/Trucks/SUV's
Specs Automotive Item Grade High Performance Body Height (in) 4 Body Length (in) 6.5 Body Width (in) 9.5 Brand Flowmonster Color Silver Emission Code 5 Finish Paint Fitment Universal Inlet Connection Type Pipe Connection Inlet Diameter (in) 2.5 Inlet Position Center Material Aluminized Steel Mount Type Uses New Hangers (Not Included) Muffler Series 1-Chamber Muffler Type Chambered Outlet Connection Type Pipe Connection Outlet Diameter (in) 2.5 Outlet Position Center Overall Length (in) 13.5 Product Type Street Mufflers Reversible No Shape Oval Sound Level Aggressive Sound Type of Muffler Chambered Vehicle Type Classic Muscle Car   Late Model Muscle Car   Street Rod   Street/Strip   Truck/SUV Part Number 42510-FM


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Return Policy

We offer 30 days return of 100% purchase price for defective items. Return shipping and handling charges are the customers responsibility unless it is our mistake. (If shipping was included it will be deducted from the return)  If the part is wrong or defective please advise us if you would like an exchange, replacement or refund. We suggest our buyers keep tracking number delivery confirmation, and pack item securely to protect the return. If the part is lost we are unable to offer a refund. The part(s) must be returned in its original condition. Returns over 30 days may be accepted at a discounted price & offered store credit. Our return address is 774 Broad St Wadsworth, Oh 44281.


This is the line that runs from the front of the vehicle to the rear. On most vehicles it connects to a junction then you will have rear axle lines. On a few cars the intermediate lines will connect to the rear wheels. It is recommended to change the axle lines if you are replacing the intermediate lines.

Our kits include all of the solid metal lines for that section of the vehicle.

We are happy to help! Please help us to help you by going to our return form and filling out the form as best as you can in order to request a return.

  • Modern Day stands by our parts and is happy to accept returns within 30 days of purchase. Parts must be in new condition.
  • If a part arrives damaged, or is defective, Please report it to us immediately. So we can handle it for your promptly.

Yes but you will need to order in advance. All of our items are not stocked at our location. So please place your order online and we will notify you when it is ready for pick up.

Unfortunately we cannot offer single lines outside of kits

Yes, all are covered by the manufacturer's standard warranty. Most warranties cover the cost of parts. Any installation or other fees are non-refundable.

Online we accept PayPal and all major Credit Cards. If your are picking an item up we gladly accept cash.

We can only ship to your confirmed address in PayPal or your billing address if you pay with a credit card.

Orders typically Arrive within 3 to 10 days depending if it is a stocked item or something we have manufactured at time of sale.

Yes please send us a message through our custom orders page.

Yes, but items sent out of the continental U.S. may incur additional charges based on their destination

The left and right sides on a vehicle are determined as though you were sitting in the driver's seat. The left is the driver's side, and the right is the passenger's side.

Check it again tomorrow. It takes up to 1 day for the carrier to give status and a delivery date. UPS and FedEx provide delivery dates, USPS usually does not but they take no longer than 5 business days.

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Still have a question or concern?  Please contact use our contact us form!

Yes! Thank you for your military service!

Warranty Information

Customer service is our top priority and because we value your time and energy we ask you to visit our Contact Us page and reach out so that we may assist you in finding the correct warranty for your product. Please include your name, the name on the order, the order number, and the SKU of the product to ensure the quickest and most accurate response to your inquiry.

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