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GMC C/K 2500 Performance Mufflers

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Latest Customer Reviews

Flowmaster Super 10 Series Mufflers Reviews

Best $140 I ever spent

Reviewed By Bryce Z (College Place, WA) Reviewed for a 1979 GMC C/K 2500 —8/13/2015 8:32 PM

Everyone thought it be loud and obnoxious so they were trying to convince me to just settle for glasspaks.... And am I glad I didn't... This thing is MEAN and very aggressive since I got two coming out, dumped at the axle complimented with headers... I recommend these mufflers to everyone!

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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 44 Series Mufflers Reviews

Flow 44

Reviewed By Mark H (ANTHEM, AZ) Reviewed for a 2011 GMC Yukon —10/29/2015 10:11 AM

Had a magna flow on muy Denali w/ 6.2 liter . So glad I changed it out with a flowmaster super 44. Now it sounds great and seems to be getting better mileage as well.

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