Click here: Current Sales and Promotions

Flowmaster Muffler 40 Series (2.5" Dual In / 3" Center Out) Chambered 425403
Flowmaster Muffler 40 Series (2.5" Dual In / 3" Center Out) Chambered 425403
Flowmaster Muffler 40 Series (2.5" Dual In / 3" Center Out) Chambered 425403

Flowmaster Muffler 40 Series (2.5" Dual In / 3" Center Out) Chambered 425403

Regular price
$112.00
Sale price
$99.95

Add to cart for shipping quote

Fitment Information

  • Universal - Requires welding and fabrication

Specs & Features

  • 40 Series Flow®- 2.50" Dual In / 3.00" Center Out - Aggressive Sound
  • Excellent Street/Strip and Off Road application
  • Noticeable interior resonance
  • Aggressive Sound Exterior Exhaust Tone
  • Durable fully welded 16 gauge aluminized steel

40 SERIES MUFFLER BY FLOWMASTER

  • The original high performance Flowmaster muffler
  • Aggressive sound for the enthusiast who likes their exhaust LOUD
  • Available in either aluminized steel or 409SS Stainless Steel
  • Stainless steel mufflers covered by limited lifetime warranty
  • Fully MIG welded for durability

    Product Description

    The muffler that started it all, the original 40 Series Muffler is an aggressive sounding street/strip muffler that delivers a powerful “Flowmaster Sound” you’ve heard so much about it. If you really want to hear your exhaust system and that great muscle car tone – from both inside and out of the vehicle – the 40 Series is for you.

      Redline360 is an authorized Flowmaster dealer and sells only genuine Flowmaster products.

              Flowmaster Brand Logo

              Prop 65 Warning WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov.


              More in this category
              Flowmaster 40 Series Mufflers
              Flowmaster Mufflers
            • Category: Exhaust Systems - Catback, Axleback and Mufflers
            • Brand: Flowmaster

              Reviews on this product


              Ordering from Redline360
              Redline360 is an Authorized Dealer so we only sell authentic and genuine parts and accessories.

              Order updates, tracking and info
              Our goal is your complete satisfaction. Upon ordering, you will receive an email confirmation of your order along with your invoice. You will be able to log into our website 24/7 to check on your order at any time. Your order is processed Monday through Friday from 8am to 6pm PST as soon as it is placed. Once your order ships, we will email you a tracking number so you can track your package.

              Protect your purchase
              Redline360 offers our customers piece of mind! We have partned with Extend to offer you Extend Product Protection and Extend Shipping Protection. Read about each protection that Extend offers to Redline360 customers!

              Multiple distribution points ready to serve you!
              We ship from multiple locations around the United States so you receive your part as quick as possible. Not every warehouse stocks all the same parts, so the closest warehouse to you that has the part in stock is where your order will ship from. We ship from California, Nevada, Indiana, Michigan, Florida, Texas and Pennsylvania.

              Secure Ordering
              We take security seriously! We are never exposed to your credit card information, and it's never stored. Credit card transactions go through the credit card processor directly. We also offer various other payment methods such as PayPal, Affirm Financing (Pay over time), Amazon Pay, Apple Pay and more!

              Any non CARB compliant items can not ship California. We will notify you if we have to cancel your order.

              Some products may be subject to local rules, laws and regulations in certain areas. Always check your local laws to determine legal restrictions. We are not responsible if you buy a product that is not legal in your area.

              For items that have free shipping, free shipping only applies to the lower 48 states.

              Questions? Contact us.

              Actual item may vary from picture