Product images and videos are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Sale

Exhaust› Mufflers and Resonators

Flowmaster

Super 40 Series 3" Inlet/Outlet Muffler

Name: Super 40 Series 3" Inlet/Outlet Muffler
Brand: Flowmaster
SKU: 700042025305

$173.00 $165.82 Save $7.18

SKU: 700042025305

Free Shipping over $200

$100 Minimum Order

Non-Returnable Item

DIY PRO SHOP

Moderate — 2–4 hours

Description

The Flowmaster Super 40 Series muffler is engineered to deliver a distinctive aggressive exhaust note and enhance performance. This chambered muffler utilizes Flowmaster's proprietary Delta Flow technology within its larger case profile, aiming to provide an optimal balance between exhaust flow and sound control. Constructed from durable 409 stainless steel, the Super 40 Series features a 3.00-inch inlet and a 3.00-inch outlet diameter. Its design is intended to produce a deep, aggressive sound note that is often accompanied by noticeable interior resonance, making it a popular choice for enthusiasts seeking a powerful exhaust tone. While the specific fitment details are extensive, it is important to note that this muffler has been referenced for applications such as the 1991 Chevrolet K1500 Silverado with a 5.0L V8 GAS engine, and 1997 GMC C1500/C2500/C3500 models, indicating its suitability for a range of trucks.

Product descriptions are provided by our supplier partners and may not always be perfectly accurate. Not sure this fits? or call (760) 282-4645 and we’ll verify before you order.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

Brand	Flowmaster
Part Number	700042025305
Category	Exhaust

Videos

Flowmaster Super 40 Series Muffler Install

The ONLY Flowmaster Video you NEED to watch

Flowmaster Super 40 Series Muffler Sound Test

I Installed A Flowmaster 40 Series Muffler On My Ford F150! | Sounds AMAZING! | NO WELDING NEEDED! |

Flowmaster 40 Series Delta Flow Muffler Review

Installing a Flowmaster Super 40 Exhaust on My 03 Silverado!!!!

Chevy Silverado 5.3L V8 Flowmaster 40 Series Muffler

DIY Flowmaster Super 44 full exhaust installation. Is it possible in your driveway?

"Project Midnight" Silverado 2500HD 6.0 Flowmaster Super 40 Muffler Install

Flowmaster Exhaust On Chevy 5.3 Install

5,000+ Trusted brands

1M+ Enthusiasts

5M+ Parts sold

(760) 282-4645 hello@motormia.co

Buy with Confidence

Returns & Fitment

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy

Shipping

Orders are processed in 1–3 business days. In stock parts ship promptly from our partner network. Special-order items either aren’t currently stocked or are built to your spec — expect 4–6 weeks. If a part goes on backorder while your order is in the queue, we’ll reach out and work through discounted alternatives together.

Free shipping over $200 in the continental US. Alaska, Hawaii, U.S. territories (Puerto Rico, U.S. Virgin Islands, Guam, American Samoa, and the Northern Mariana Islands), and international orders carry surcharges — most appear at checkout. Some exceptions (LTL freight, or suppliers who quote freight only after we place the order) won’t. In those cases we’ll reach out with the exact charge before your order moves forward.

View Full Shipping Policy