Flowmaster 8425154 Super 10 Delta Flow Chambered Exhaust Muffler - 2.5

Flowmaster 8425154 Super 10 Delta Flow Chambered Exhaust Muffler - 2.5" IN/OUT

$101.95 In Stock Sold out




  • Description
  • Shipping and Refund
  • Reviews

Flowmaster's Super 10 Series 409S Stainless Steel - Single Chamber mufflers are intended for customers who desire the loudest and most aggressive sound they can find. Because these mufflers are so aggressive, they are recommended only for off highway use and not for street driven vehicles. These mufflers utilize the same patented Delta Flow technology that is found in Flowmaster's other Super series mufflers to deliver maximum performance. Super 10 Series mufflers are constructed of 16-gauge 409S Stainless Steel and fully MIG-welded for maximum durability. These mufflers are covered by Flowmaster's Lifetime Limited Warranty.


  • Flowmaster Super 10 Series Chambered Muffler.
  • Flowmaster Chambered Technology
  • Super Aggressive Sound
  • 409SS Stainless Steel Construction
  • Flowmaster Reliability
  • Automotive Item Grade: High Performance
  • Body Height (in): 4.25
  • Body Length (in): 6.5
  • Body Width (in): 9.75
  • Brand: Flowmaster
  • Color: Black
  • Emission Code: 5
  • Finish: Paint
  • Fitment: Universal
  • Inlet Connection Type: Pipe Connection
  • Inlet Diameter (in): 2.5
  • Inlet Position: Dual
  • Material: 409 Stainless Steel
  • Mount Type: Uses New Hangers (Not Included)
  • Muffler Series: Super 10 Series
  • Muffler Type: Chambered
  • Outlet Connection Type: Pipe Connection
  • Outlet Diameter (in): 2.5
  • Outlet Position: Dual
  • Overall Length (in): 12.5
  • Product Type: Street Mufflers
  • Reversible: No
  • Shape: Oval
  • Sound Level: Aggressive Sound
  • Type of Exhaust: Muffler
  • Type of Muffler: Chambered


  • Universal Muffler - Some adaptation may be required.


  • We do our best to ship most items same or next day.
  • For all products, free fast delivery of the UPS is already included in the price.

Shipping is Free 🙂



Shipping and Delivery Times


  • All in-stock products are shipped within one business day. Delivery usually takes 2-5 business days. We have a large number of warehouses in different states which allows us to deliver the orders very fast.





  • Most products are shipped via UPS Ground, FedEx depending on size with some large items shipped by SAIA or others.
  • Once your order ships, tracking details will be emailed to you.



Where’s my order?


  • Good question, when tracking details have been provided that means your order has been processed and shipped. Tracking details usually appear in the shipper’s database within one business day, i.e. UPS and FedEx generally provide point-in-time tracking meaning your order location is updated as it is scans and gets closer to you.  Most orders should arrive within 2-5 business days. Still have an issue with delivery, please contact us to see how we can help.





  • Cancellations are free. Please contact us ASAP if you need to cancel your order.

Customer Reviews

Based on 1 review
Sounds awesome

Installed on 03 silverado ss. Got some pipe and this muffler. Welded it in with factory tail pipe. Sounds really good but it is really loud. It is a bit of work to install this muffler and do a good job but much cheaper than a cat back kit.

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