The muffler that started it all, the original 40 Series Muffler is an aggressive sounding street/strip muffler that delivers a powerful “Flowmaster Sound”. If you really want to hear your exhaust system – from both inside and outside of the vehicle, the 40 Series is for you. Available in either aluminized steel or 409S Stainless Steel and fully MIG welded for durability.
While the Flowmaster muffler produces more power than the original equipment mufflers, they also produce the unique "Flowmaster sound", which has become the preferred choice of many Mustang enthusiasts. Flowmaster mufflers are constructed with 16 gauge aluminized steel. Flowmaster 3 chamber mufflers (Delta Flow Series) are not as loud as the 2 chamber mufflers.
Flowmaster, the exhaust technology company, has deep roots in the Mustang performance exhaust history. The Flowmaster 2 chamber muffler was one of and still is one of the most sought after exhaust additions to any Ford Mustang. Their deep throaty exhaust was made super popular during the Fox Body Mustang era with their 2 chamber 40 series mufflers that have now become muffler legends. Since then Flowmaster has evolved and branched off into more than just great sounding mufflers.
They now produce some of the best sounding and highest quality cat back and axle back systems. They also produce high flow catalytic converters, long tube headers and mid pipes to ensure they have every component you need to finish your Mustang exhaust project off the right way! Click the link above to see the full line of Flowmaster exhaust component for your Mustang.
In the early 1980s, Flow Master Mufflers were born to combat excessive sound issues at race tracks in California and all across the US. One patented innovation led to another and evolved into the company it is today. All Flow Master products are proudly manufactured right here in the USA and will improve the sound and performance of your Mustang or Lightning.
Latemodelrestoration.com carries full cat backs, axle backs, individual mufflers, and catalytic converters. If you're not viewing this video on our site, click below to check out our Flow Master offering and give your Mustang or Lightning the signature Flow Master sound.
Check out our YouTube channel for even more tech tips, installation videos, how-tos, and more. The best place to go for anything Mustang related!
If you're looking for that "old school" fox body sound, these mufflers are it! Sounds great and the drone that I was worried about is really not bad. Thanks LMR!
Yes, I would recommend this item to a friend!
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Go Flowmaster, or GO HOME!
Daniel W. on
If you want the original Flowmaster sound, these are for you. NOTHING beats the rumble of a set of the original Flowmaster 40's. These have a more aggressive sound than the Delta Flow style, which is exactly what I wanted. If you are more worried about your stereo, try something else. But if you are a die hard motorhead like myself, who turns the radio off to listen to the exhaust, these are for you!
Flowmaster - The Exhaust Technology Company Flowmaster operates the only exhaust Research & Design facilities of its kind in the world, centered around the SuperFlow SF-7100 engine dynamometer complete with E.C.A. (engine cycle analysis) equipment and also SuperFlow chassis dyno's.
Through use of these dyno's, Flowmaster's engineering staff can track the complete engine cycle in millionths of a second and can obtain exact technical data of each degree of cam rotation, from induction to the tip of the exhaust system, while also showing the power numbers that really matter, the power numbers "to the ground."
Flowmaster also utilizes Spectrum Analyzers to fine "tune" the sound of each of the eleven different series of mufflers that Flowmaster currently offers, both for peak performance and just the right sound levels and tones. Flowmaster's dedication to quality is what makes them the exhaust industry leader for Latemodel Mustangs and SVT Lightnings!
This is by far the best experience I have ever had buying parts for my mustang. There is no other place for me, then LatemodelResto. I have bought multiple parts over multiple orders and have had nothing but a smile from ear to ear. Aaron Westerman was my contact person from LatemodelResto. I could not ask for a better customer service representative than him! He went above and beyond multiple times for me and made my experience with Latemodel the reason I keep coming back. LatemodelResto will continue being my #1 stop for my Mustang parts.