Product ReviewsFlowmaster 40 Series Chambered Muffler 2.5" O / C Aggressive Sound # 42541

Deep throating growling muffler

Love Flowmaster mufflers, I've had them on 4 of my cars and trucks and was always satisfied with the results. Especially on my most recent purchase of the 40's that I put on my sbc Nova the sound is like no other. I love that deep, throaty, deep growling sound and not so loud on idle and no drone sound in the car. I would highly recommend these mufflers to anyone looking for that same soundRead full review...

Verified purchase:  Yes | Condition: new | Sold by: banshee_auto_parts

Flowmaster 40

Purchaced a flowmaster 40 muffler years ago for my dodge van with a slightly worked magnum 318 and a high flow cat when my stock cat went bad,,, The sound is exactly what I was looking for deep and throaty,,. Also helped my speed on the top end and helped the motor breath easier,, you will not be disappointed with the flowmaster 40 muffler,,Read full review...

Verified purchase:  Yes | Condition: new | Sold by: drshotrodparts

FLOWMASTER the sound of muscle.

Great sounding muffler,nice throaty muscle car sound.Original 40 series sounds better than the super 40 series muffler.Price not bad considering the competition out there.

Verified purchase:  Yes | Condition: new | Sold by: performance-curve

Flowmaster...Need I say More?

Flowmaster Quality! Just what I was looking for. Would buy again. Thanks for the great service.

Verified purchase:  Yes | Condition: new | Sold by: mufflerd15

Sounds great

Anyone with a 4.3 vortec I would highly recommend this muffler! It doesn't have the high pitch at higher rpm's! Has a nice growl at idol!

Verified purchase:  Yes | Condition: new | Sold by: performance-curve

easy to install

great muffler good price

Verified purchase:  Yes | Condition: new | Sold by: performance-curve

Great sounding perfect growl!

Have this on my 2003 Chevy S10 2.2L and it made a huge difference love the little growl!!

Verified purchase:  Yes | Condition: new | Sold by: kmjperformance

Excellent, super deep rumble from a Ford truck

The sound exactly like you would expect the original Flowmaster 40 to sound, very deep rumble, no rasp whatsoever

Verified purchase:  Yes | Condition: new | Sold by: performance-curve

love the sound

Flowmaster rocks

Sounds great!

Verified purchase:  Yes | Condition: new | Sold by: kmjperformance