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Flowmaster 50 Series Big Block Mufflers Part #530513 Customer Reviews

Average Rating

7 Customer Reviews

orange crush

Reviewed by Kemuel J (Aurora, CO) Reviewed for a 2002 Chevy Avalanche — Aug 31, 2014 11:05 AM

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I love the big block flow master muffler. it sounds great more flow. it was one of my best purchases. Go flow master the best !!!!!!

Flowmaster for '05 Silverado

Reviewed by Roland R (North Las Vegas, NV) Reviewed for a 2005 Chevy Silverado — Jun 19, 2013 10:09 AM

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Exactly the tone I wanted and not overly loud. Wanted to also reduce back pressure and perhaps improve mileage; have not yet been able to confirm that. The muffler fit well with the included length of pipe and looked strong and durable.

Installed on 2003 GMC 2500HD 6.0

Reviewed by Jonathan V (Saint Paul, MN) Reviewed for a 2003 GMC C/K 2500 — Mar 02, 2011 6:43 AM

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5 of 5 people found the following review helpful.

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.

50 Series Flowmaster Dual In & Single Out

Reviewed by Dale J F (Cheyenne, WY) Reviewed for a 2005 Cadillac Escalade — Dec 25, 2010 6:47 AM

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2 of 2 people found the following review helpful.

Sound was Great and 1 MPG increase in mileage. Muffler attachment did match exhaust pipe. A little fabrication required but well worth it. Very Happy with purchase!

2008 Tundra Giddy-Up

Reviewed by Royston J (Fort Worth, TX) Reviewed for a 2008 Toyota Tundra — Feb 12, 2008 8:10 PM

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20 of 22 people found the following review helpful.

Perfect rumble, not irritating. I think this would be the answer for anyone wanting to keep the sound close to stock until you get on it then the gates of hell open up :-0

Great Flowmaster

Reviewed by Adam H (Saint Charles, MO) Reviewed for a 1998 Chrysler Sebring — Mar 28, 2007 8:36 AM

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9 of 10 people found the following review helpful.

Put this on my 05 Yukon Denali 6.0. Having driven street cars in the past, I thought it could be louder at Idle, but it does sound great when you get on it and there is NO inside drone while cruising. I drove it in downtown Chicago not long ago and the sound from the muffler bouncing between the building was sweet. All in all I am happy.

feed back on the flowmaster 50 big block

Reviewed by jason w (Texas City, TX) Reviewed for a 2005 GMC C/K 2500 — Feb 10, 2007 6:55 AM

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11 of 14 people found the following review helpful.

great product my truck sounds tuff

Flowmaster 50 Series Big Block Mufflers - 530513

Dual Inlet / Opposite Offset Outlet
(7)
  • $188.36 - $202.72
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  • Ships Between 10/26 - 10/30

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  • Part Size:
    3" Inlet/3.5" Outlet
  • Style:
    Aluminized
  • Part #:
    530513
  • Flowmaster Part #: 530513
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