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GMC C/K 2500 Performance Mufflers

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Latest Customer Reviews

Flowmaster 50 Series Big Block Mufflers Reviews


Installed on 2003 GMC 2500HD 6.0

Reviewed By Jonathan V (Saint Paul, MN) Reviewed for a 2003 GMC C/K 2500 —3/2/2011 6:43 AM

I installed this muffler on my truck. The only other engine mods I have on is a Spectre CAI. I highly advise getting it welded, as the clamps just couldn't secure the muffler properly. The shop charged me $150 to weld it- a ripoff, but it's worth it. Flowmaster says that the GM 6.0 is the hardest motor to quiet down, so I advise getting this muffler. According to Flowmaster, this is the biggest, quietest muffler they produce. The sound is great. Very powerful, not too loud, either. There is a noticeable drone at around 2000 rpm, but I got used to it fast. It sounds great on the inside, and even better on the outside. I did certainly feel a power boost all across the rpm band, but no improvement in mpg's. And as usual, AutoAnything was terrific.

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Flowmaster Super 10 Series Mufflers Reviews


Awesome sound

Reviewed By Matt E (MIDDLETOWN, MO) Reviewed for a 2012 Dodge Ram —12/22/2014 3:04 PM

2012 ram hemi 5.7 crew cab. Basic swap out from the OEM muffler and man! This thing is loud. Beware, this thing drones pretty bad at 60mph and I still have the resonators left on. This muffler really turns heads. Haven't checked gas mileage yet because I haven't taken my foot off the accelerator! Bought the 3inch inlet/ 2.5inch outlet.

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Flowmaster Original 40 Series Mufflers Reviews


Great Muffler

Reviewed By Rodolfo T (Laredo, TX) Reviewed for a 2012 Toyota Tacoma —12/22/2014 2:39 PM

Everything your looking for when getting a new muffler. Very satissfied.

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