Flowmaster 40 Series Chambered Muffler

40 Series - 3.00 Center In / 2.50 Dual Out - Aggressive Sound

Part # 430402

1 Review

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$99.18

Suggested Retail

$111.00

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Emissions

This part is legal for sale or use on Emissions Controlled Vehicles, Uncontrolled (Non-Emissions Controlled) Vehicles, and Racing Use Only Vehicles because it does not affect vehicle emissions and is not covered by emissions regulations.

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The Original 40 series muffler delivers an aggressive exterior and interior tone. If you're looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.

Features:

Durable fully welded 16 gauge aluminized steel
Noticeable interior resonance
Excellent Street/Strip and Off Road application
Aggressive Sound Exterior Exhaust Tone

About Flowmaster

Flowmaster® is a household name, and for good reason. They've built legendary exhaust systems and mufflers for decades, and now offer performance air intakes, catalytic converters, and headers to give your hot rod performance to match the iconic Flowmaster sound.

Automotive Item Grade	High Performance
Body Height (in)	4
Body Length (in)	13
Body Width (in)	9.75
Brand	Flowmaster
Color	Black
Emission Code	5
Finish	Paint
Fitment	Universal
Inlet Connection Type	Pipe Connection
Inlet Diameter (in)	3
Inlet Position	Center
Material	Aluminized Steel
Mount Type	Uses New Hangers (Not Included)
Muffler Series	Original 40 Series
Muffler Type	Chambered
Outlet Connection Type	Pipe Connection
Outlet Diameter (in)	2.5
Outlet Position	Dual
Overall Length (in)	19
Product Type	Street Mufflers
Reversible	No
Shape	Oval
Sound Level	Aggressive Sound
Type of Muffler	Chambered
Vehicle Type	Classic Muscle Car
	Late Model Muscle Car
	Street Rod
	Street/Strip
	Truck/SUV
UPC	700042010448
California Proposition 65 Required	No
Part Number	430402

Warranty for Part# 430402

Street Application Tech

Universal Muffler - Some adaptation may be required.

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40 Series Muffler

By Maynard R on March 29, 2019

I recently purchased the Flowmaster 17428 Cat Back System for my 2001 Chevrolet Silverado Pick up. Reading and understanding the instructions this thing went in in less than 2 hours and I did it in my Garage, with Truck on Jack Stands. Start your truck and let it get to running temperature which will help with Bolt and Nut Removal. Spray all the affected Nuts and Bolts with a Penetrating oil, WD, kROIL, ETC. I found this to help the removal of your existing system is to cut the Tail Pipe assembly right behind the existing Muffler, and remove. Loosen and remove the Nuts that attach your existing system to the Cats. Remove that section of Pipe and Muffler. Install the 3" Diameter section of Pipe, and stick into the existing hanger. Bolt it up but do not Tighten. Install your Muffler per the diagram that comes with your system. And install the 2-1/2" Exit Pipes and tighten Clamps but do not Finish! Install the Tips and use a gauge like a piece of wood to angle them the way you like.Then go back and tighten everything from the Tail tips back to the 3" Main Pipe that attaches to the Cats. Start the Truck and let it run. It will Purr Like a Kitten on steroids! I am very happy with this system and would recommend this system if you want a Truck to sound like a Truck! Next will be the Cats and then Headers and then a New motor will be installed. I hope this helps and am very happy with the sound. There is hardly any Drone and you can carry on a conversation while driving at any speed. Drone zero's at 80 MPH!Hope it makes you as happy as myself.

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*Free Shipping & Handling only offered to the contiguous US on orders over $100, excludes clearance parts and oversized packages.

Some parts are not legal for use in California or other states with similar regulations.

Flowmaster 40 Series Chambered Muffler

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