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Flowmaster 70 Series Big Block II Mufflers Part #524704 Customer Reviews

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3 Customer Reviews

Flowmaster 70 Series Big Block II Muffler

Reviewed by Ron B (Stephenson, MI) Reviewed for a 2000 Chevy C/K 2500 — Jan 25, 2012 7:03 PM

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5 of 5 people found the following review helpful.

Great sounding performance muffler that isn't too loud ! Just the right amount of bark.

The Yukon XL hums

Reviewed by Joe S (Boulder, CO) Reviewed for a 2001 GMC Yukon XL — Feb 03, 2010 1:47 PM

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18 of 18 people found the following review helpful.

Wanted to spruce of the old rig, 2001 GMC Yukon Denali XL, so asked a lot of car guys for advise. The 70 Series seemed to be the choice. The XL is the family car and not a muscle car. Autoeverything price can't be beat. Meineke did an install for $50 as it was essentially a swap. They needed to flute the pipes a bit as stock is 2 5/8 and 70 Series are 2 1/4. Dual in, dual out into a Y with a single exhaust. Experts appear split on benefits of dual exhaust, bigger sound, maybe little power boost. Dual exhaust pipes would have cost another $300 or so. Sounds great and heads turn, but inside the rumble is pleasant. A bigger sound might be great at first, but conversation in the car would suffer. Kept the factory pipes, single outlet. I love starting up the Yukon and I feel the extra power for sure. I can really feel the power on climbs. Also put in an oversized K&N airfilter.

my truck

Reviewed by john k (Warfield, KY) — Jul 18, 2007 1:19 AM

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8 of 10 people found the following review helpful.

turned out to be the best sound i have had.

Flowmaster 70 Series Big Block II Mufflers - 524704

Dual Inlet / Dual Outlet
(3)
  • $160.61 - $165.62
  • 1-Year Lower-Price Guarantee
  • Free Shipping
  • Ships By 8/22

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  • Part Size:
    2.25" Inlet/2.25" Outlet
  • Style:
    Aluminized
  • Part #:
    524704
  • Flowmaster Part #: 524704
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