1991 GMC K1500 Performance Exhaust Mufflers

Your 1991 GMC K1500 might be the best vehicle you’ve ever owned. Or you may just be struggling to keep it highway-approved. No matter the situation, Advance Auto Parts has the Performance Exhaust Mufflers you desperately need.

We currently carry 9 Performance Exhaust Mufflers to choose from for your 1991 GMC K1500, and our inventory prices range from as little as $63.39 up to $221.99.

On top of low prices, Advance Auto Parts offers 4 different trusted brands of Performance Exhaust Mufflers for the 1991 GMC K1500. We only sell parts from trusted brands like Flowmaster Inc. so that you can find quality parts you can count on.

Don’t take our word for it – check out customer ratings and reviews to buy with confidence. We have 58 reviews on our Performance Exhaust Mufflers for the 1991 GMC K1500 from previous customers.

Have parts delivered straight to your home, or find the nearest Advance Auto Parts store to check out our Performance Exhaust Mufflers stock in-person!

Performance Exhaust Mufflers for Your 1991 GMC K1500

Flowmaster Inc. – 40 Series Muffler, 2.5in Offset Inlet 2.5in Offset Outlet, Non-Reversible, Aggressive Sound (Part No.42543)

40 Series Muffler, 2.5in Offset Inlet 2.5in Offset Outlet, Non-Reversible, Aggressive Sound

from

$99.99
The Original 40 series muffler delivers an aggressive exterior and interior tone. If you’re looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.
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Dynomax – Super Turbo Muffler Universal Fit Aluminized Steel 13" L, 3" In, 2.5" Out, Oval (Part No.17674)

Super Turbo Muffler Universal Fit Aluminized Steel 13" L, 3" In, 2.5" Out, Oval

from

$89.99
DynoMax Super Turbo performance mufflers exclusive patented flow director design channels exhaust flow and eliminates turbulence on most applications. The large internal flow tubes improve exhaust flow and reduce backpressure. Each muffler uses fiberglass matting technology to absorb unwanted interior resonance while maintaining a mellow performance tone.

Product Features:
  • Large internal flow tubes improve exhaust flow and reduce backpressure
  • Exclusive patented flow director design channels exhaust flow and eliminates turbulence on most applications.
  • Fiberglass matting technology to absorb unwanted interior resonance while maintaining a mellow performance tone
  • Dyno proven to flow up to 700 SCFM
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Flowtech – Afterburner Muffler, 3in Center Inlet 2.5in Dual Offset Outlet, Non-Reversible, Aggressive Sound (Part No.50370FLT)

Afterburner Muffler, 3in Center Inlet 2.5in Dual Offset Outlet, Non-Reversible, Aggressive Sound

from

$130.99


Product Features:
  • Made From Aluminized Case
  • Rust And Corrosion Protection
  • Stronger Seams Prevent Blow Out
  • Provides More Horsepower
  • Max Flow In Either Direction
  • Powerful Sound With No Resonance
  • Limited Lifetime Warranty
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Flowmaster Inc. – 40 Series Muffler, 3in Offset Inlet 3in Offset Outlet, 13in long, Non-Reversible, Aggressive Sound (Part No.8043043)

40 Series Muffler, 3in Offset Inlet 3in Offset Outlet, 13in long, Non-Reversible, Aggressive Sound

from

$123.99
The Original 40 series muffler delivers an aggressive exterior and interior tone. If you’re looking for that original Flowmaster sound this is the muffler is for you. Constructed of 16 gauge 409S stainless steel and fully MIG welded for maximum durability.
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Hooker Headers – Competition Turbo Muffler, 2.25in Offset Inlet 2.25in Center Outlet, Non-Reversible, Mild Sound (Part No.21005HKR)

Competition Turbo Muffler, 2.25in Offset Inlet 2.25in Center Outlet, Non-Reversible, Mild Sound

from

$63.39
Competition Turbo Mufflers utilized a low back pressure baffle network designed to flow in either direction resulting in better performance and economy.

Product Features:
  • Low Backpressure Baffle Network
  • Compact Design
  • Improved Engine Efficiency
  • Better Performance And Economy
  • Throaty Sound On Acceleration
  • Quiet At Idle And Cruising
  • Double Wrapped Aluminized Steel
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Flowmaster Inc. – 70 Series Muffler, 3in Center Inlet 2.5in Dual Offset Outlet, 22in long, Non-Reversible, Mild Sound (Part No.530702)

70 Series Muffler, 3in Center Inlet 2.5in Dual Offset Outlet, 22in long, Non-Reversible, Mild Sound

from

$221.99
The 70 series utilizes Flowmaster’s patented Delta Flow technology and an enlarged case for improved sound control along with mileage and power gains. Perfect for use on trucks, SUV’s, RVs, tow vehicles and high performance street cars where space allows. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.
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Flowmaster Inc. – Super 50 Muffler, 3in Center Inlet 2.5in Dual Offset Outlet, Non-Reversible, Moderate Sound (Part No.530552)

Super 50 Muffler, 3in Center Inlet 2.5in Dual Offset Outlet, Non-Reversible, Moderate Sound

from

$198.99
The Super 50 series muffler is a larger version of Flowmaster’s 50 series Delta Flow muffler. Originally designed for trucks and SUV’s, it is also well suited to muscle car and high performance applications. In addition, the larger case size significantly reduces interior resonance and provides a deep, rich tone along with mileage and power gains. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.
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Flowtech – Terminator  Muffler, 3in Center Inlet 2.5in Dual Offset Outlet, Non-Reversible, Moderate Sound (Part No.50170FLT)

Terminator  Muffler, 3in Center Inlet 2.5in Dual Offset Outlet, Non-Reversible, Moderate Sound

from

$154.99


Product Features:
  • Aluminized Steel Construction
  • 3in. Inner Pass Tubes
  • Reduce Backpressure
  • Increase Horsepower
  • No Glass To Burn Or Blow Out
  • Will Flow In Either Direction
  • Welded For Strength/Durability
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Flowmaster Inc. – Super 40 Series Muffler, 2.5in Offset Inlet 2.5in Offset Outlet, Non-Reversible, Aggressive Sound (Part No.952548)

Super 40 Series Muffler, 2.5in Offset Inlet 2.5in Offset Outlet, Non-Reversible, Aggressive Sound

from

$133.99
The Super 40 features Flowmaster’s Delta Flow technology. It’s larger case profile provides the best of both worlds of performance and sound. The Super 40 has that deep powerful sound of the Original 40 series but with all the benefits of performance and low interior resonance from the Delta Flow technology. Constructed of 16 gauge aluminized steel and fully MIG welded for maximum durability.
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FAQs for 1991 GMC K1500 Performance Exhaust Mufflers

What are the most popular Performance Exhaust Mufflers for the 1991 GMC K1500?

With 4 brands you can trust, our most popular Performance Exhaust Mufflers for the 1991 GMC K1500 parts are:
Afterburner Muffler, 3in Center Inlet 2.5in Dual Offset Outlet, Non-Reversible, Aggressive Sound
from $130.99
This product is not rated
Afterburner Muffler, 3in Center Inlet 2.5in Dual Offset Outlet, Non-Reversible, Aggressive Sound
Performance Exhaust Mufflers