



🔥 Elevate your exhaust game with Flowmaster’s perfect balance of power and style!
The Flowmaster 74151 FlowFX Muffler features a durable 409 stainless steel construction with a 3.5-inch center inlet/outlet design. Its high-temp sound absorption material provides a moderate, deep throaty tone that’s quiet at idle but aggressive under acceleration. The straight-through design optimizes exhaust flow for improved performance, making it a top choice for drivers seeking both style and substance.
| ASIN | B0845Q87RS |
| Best Sellers Rank | #116,869 in Automotive ( See Top 100 in Automotive ) #90 in Automotive Replacement Exhaust Mufflers |
| Brand | Flowmaster |
| Brand Name | Flowmaster |
| Customer Reviews | 4.5 out of 5 stars 106 Reviews |
| Global Trade Identification Number | 00700042039791 |
| Included Components | Flowmaster 74151 3.5 In(C)/Out(C), 5X8X18, Flow Fx Muffler |
| Item Dimensions | 25.2 x 8.9 x 5.5 inches |
| Item Type Name | Flowmaster 74151 3.5 In(C)/Out(C), 5X8X18, Flow Fx Muffler |
| Item Weight | 11.85 Pounds |
| Item dimensions L x W x H | 25.2 x 8.9 x 5.5 inches |
| Manufacturer | Flowmaster |
| Manufacturer Part Number | 74151 |
| Manufacturer Warranty Description | Warranty |
| Material | Plastic |
| Material Type | Plastic |
| Model Number | 74151 |
| OEM Equivalent Part Number | 74151 |
| Part Interchange Info | 74151 |
| Shape | Rectangular |
| UPC | 700042039791 |
| Unit Count | 1.0 Count |
P**.
Amazing sound
This muffler sounds amazing, it definitely has a deep throaty sound.
S**O
Quality piece
Takes a little of the raspiness away, I installed it at the end of my exhaust pipe. A lot quieter at idle, still very loud at WOT.
M**A
Awesome Exhaust!!!!!
Installed it on my 2016 Silverado 1500 LT. Exactly the right amount of sound i was looking for. Really good aggressive but not overwhealming sound.
J**E
Loud with headers...
Great quality.. But with long tube headers on my 6.0 gas Silverado.. it's loooouddd... Bad drone.. sounds good. But not a good choice for daily or tow rig.
S**E
6.0 Silverado YES!
Exactly what I needed for a decent, none obnoxious noisy as heck straight through full flow exhaust on my 2006 6.0 gas Silverado. Replaced my sorry use of a glasspack that still sounded like it was straight piped. Completely took away the ear drum bursting drone and now sounds much quieter inside the cabin. Love it!
A**R
I'm excited for cold starts. A very mellow rumble
I'm running this on a 2012 6.2 denali. It sounds amazing. Just enough to where you can hear it. But not too much where the sound is obnoxious. Keep the resonator, delete the third cat, and you have a very tasteful sound. Even none car people have complimented it. The box looks like it survive world war II. I dont know what it went through in shipping. the muffler itself had a couple small dents but I didn't mind. It was still usable
A**R
Great muffler replacement for 2013 gmc sierra 2500
Nice start up tone when cold and mellows out when warm. A decent drone but not obnoxious going down the road. Installation was easy and looks great under the truck. This is on a family HD truck for towing and hauling and I wanted something that wasn’t expensive and loud. Not in my 20’s anymore so loud noises do not appeal to myself or my family of 5. Thank you.
O**R
Finally some quiet time
I had a lot of work done to my 2002 Chevy 2500HD 6.6 Turbo diesel. IE: new injectors, pressure lines ,Head gaskets, water pump radiator rear brakes and a new bearing. While it was being worked on I told them to loose the muffler, they did, it ran a lot better but, it also made way tooo much noise. Now I have a flow master straight through fiberglass packed muffler, still gives me a growl but not a nasty sound,
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