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Flowmaster 40 Series 2 Chamber Muffler 2.25" Offset Inlet/Outlet


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Flowmaster 40 Series 2 Chamber Muffler   2.25" Offset Inlet/Outlet
  • Flowmaster 40 Series 2 Chamber Muffler   2.25" Offset Inlet/Outlet
  • Flowmaster 40 Series 2 Chamber Muffler   2.25" Offset Inlet/Outlet
  • Flowmaster 40 Series 2 Chamber Muffler   2.25" Offset Inlet/Outlet
  • Flowmaster 40 Series 2 Chamber Muffler   2.25" Offset Inlet/Outlet
  • Flowmaster 40 Series 2 Chamber Muffler   2.25" Offset Inlet/Outlet
  • Flowmaster 40 Series 2 Chamber Muffler   2.25" Offset Inlet/Outlet

The muffler that started it all, the original 40 Series Muffler is an aggressive sounding street/strip muffler that delivers a powerful “Flowmaster Sound”.

Item# FM42443

Your Price: $77.50

Market Price:$85.25
You Save 10.00 % ($7.75)

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Benefits

  • "Flowmaster" Sound
  • Increase Performance

Features

  • Two Chamber Design
  • Powerful Rich Exhaust Tone
  • MIG Welded

What's in the Box

  • (1) Muffler

Made in the USA

Product Description

2.25" offset inlet
2.25" offset outlet


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.

Product Videos

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!


1 Customer Photo



Community Q&A

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Customer Reviews


5.0
out of 5 stars
5 stars
6 reviews
5 stars    6
4 stars    0
3 stars    0
2 stars    0
1 star    0

100%
OF CUSTOMERS
RECOMMEND THIS PRODUCT
3 of 3 REVIEWS
RECOMMEND THIS PRODUCT
3 of 3 REVIEWS


  These mufflers sound great with an o/r x-pipe on my Bullitt.
By on 10/16/2013
Good quality, perfect fitment for the 2.25 stock exhaust. Deep aggressive rumble with the muscle car rasp from the days of old. Good mufflers to make your car bark.

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  Classic sound
By on 9/11/2013
I put a pair of these on my '03 GT 'Vert, had a shop weld them on.
They really change the sound of the car, aggressive when under acceleration but fairly quiet at highway cruising speed.
I'm glad I chose these Flowmaster 40's.

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  OUT FREAKIN' STANDING
By on 1/9/2014
I put these on my '93 GT Convertible and they sound great! i know it'll sound even better in a week or so once they are fully broken in. Nothing but deep muscle sound; all of the tone on the outside, none on the inside. Quiet enough to still have a normal conversation in the cab or even talk on your cell phone. Trust me, you will not be disappointed.

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  Unbelievable Sound
By on 3/7/2014
The mufflers on my 88 GT Foxbody were the original mufflers that came on the car. They were worn out. Put these Flowmaster 40 Series mufflers on. Made my car come to life the sound is unreal.

Yes, I would recommend this item to a friend!


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  Great Sound Of Flowmaster
By on 2/10/2014
My old glasspacks had holes in them and needed replacement so I chose Flowmaster and glad I did. They produce just the right tone without waking up the whole neighbourhood. During the past 18 years, I have added a Vortech supercharger, Cobra intake, 65 mm throttle body, 24ib per hour injectors, MSD ignition, JBA headers, 3:55 rear end, springs from Ford racing, new struts and shocks, rear disc brake conversion, short throw shifter for 5 speed, and Cobra wheels, new cylinders for convertible top and motors for rear windows.
This Foxbody rocks, big time!!

Yes, I would recommend this item to a friend!


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  awesome sound
By on 3/5/2014
Just installed last weekend. The original 40 series flowmaster mufflers combo with long tube headers and H- pipe really sound great. Had these on my previous mustang and would recommend to anyone trying to achieve that unique mustang sound.

Yes, I would recommend this item to a friend!


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About This Brand


Flowmaster
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!

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