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GMC K15 Muffler

We have 4 Items In-stock. Select a year to continue.
$57.04 List Price $113.96 Save $56.92 Availability: In Stock
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MUFFLER -- Stock Replacement, Original Equipment Quality, Sold Individually
  • SKU#: WK21784
  • Brand: Walker
  • Fit Note: 117.5 in. Wheelbase, Truck, Except California Emission System, 117.5 in. Wheelbase, Truck, 131.5 in. Wheelbase, Truck, Except California Emission System, 131.5 in. Wheelbase, Truck, Truck
  • Quantity Sold: Sold Individually
  • Sound Level: Stock
  • Anticipated Ship Out Time: Same day - 1 business day
 
Fits the following GMC K15 Years:
  • 1978 | 8 Cyl 5.0L | Base, High Sierra, Sierra Classic, Sierra Grande
  • 1976-1978 | 6 Cyl 4.1L | Base, High Sierra, Sierra Classic, Sierra Grande
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$89.99 List Price $116.46 Save $26.47 Availability: In Stock
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FLOWMASTER – SUPER 40 SERIES DELTA FLOW MUFFLERS

Flowmaster’s Super 40 Series Delta Flow mufflers give your vehicle noticeable edge with their aggressive tone – surely one of the reasons they’re a top choice among performance enthusiasts and street rodders. Flowmaster, known as ‘the exhaust technology company,’ is a leading manufacturer of high performance exhaust systems and respected for design, innovation and engineering.

  • Increases torque and horsepower
  • 3-year warranty for aluminized steel, lifetime warranty for stainless steel
  • Finish is black
  • Fully MIG-welded for maximum strength
  • Come in stainless steel and 16-gauge aluminized steel
  • Distinct, very aggressive tone with moderate interior sound
  • Fabricated utilizing patented Delta Flow process and 2-chamber design
  • Quick and easy installation
  • Primarily designed for and used on performance vehicles and street rods
  • Dyno-tested
  • SKU#: F13952448
  • Brand: Flowmaster
  • Product Fit: Minor Modifications
  • Quantity Sold: Sold Individually
  • Sound Level: Aggressive
  • Recommended Use: Performance
  • Anticipated Ship Out Time: 1-2 Business Days
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Fits the following GMC K15 Years:
  • 1976-1978 | 8 Cyl 5.0L | Base, High Sierra, Sierra Classic, Sierra Grande
  • 1975-1978 | 8 Cyl 6.6L | Base, High Sierra, Sierra Classic, Sierra Grande
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Rating: (see review/s)

"I know Flowmaster is a performance muffler, I wish I knew more about the sound to expect from this muffler, I have a cap on my truck at about 2000 RPM it resonates very loudly in my cab. I'm sure it sounds great on the outside,and has a nice throaty sound when idleing." posted by: on September 10, 2009

$42.27 List Price $49.88 Save $7.61 Availability: In Stock
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Heartthrob Exhaust Turbo Universal Mufflers combine quiet performance with nice flow. They are double-wrapped and welded with two baffles and cores. The double wrapped shell provides a quieter sound than single-wrapped welded turbo mufflers.

Feature(s):

  • Mild sound
  • Reversible

Specifications:

  • Round body shape
  • Single center inlet and outlet configuration
  • 2.25 in. inlet diameter
  • 2.25 in. outlet diameter
  • SKU#: HEA422
  • Brand: Heartthrob Exhaust
  • Fit Note: 1 Ton, Small Block Engine, 1/2 Ton, 3/4 Ton, 3/4 Ton, 1 Ton, Small Block Engine, 3/4 Ton
  • Product Fit: Universal
  • Quantity Sold: Sold Individually
  • Sound Level: Mild
  • Recommended Use: Performance
  • Anticipated Ship Out Time: 4-5 business days
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Fits the following GMC K15 Years:
  • 1975-1978 | All Engines | All Submodels
$90.61 List Price $145.59 Save $54.98 Availability: In Stock
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GIBSON – SUPERFLOW MUFFLERS

Gibson’s Superflow mufflers are dyno-proven to dramatically increase the performance of your low to mid-range RPMs due to their Convergent Flow technology and straight design that makes exhaust flow more efficiently. Gibson is known as the leading manufacturer of street-legal, high performance exhaust systems for trucks, SUVs, diesels, off-road vehicles and RVs.

  • Most reliable, trouble-free and affordable muffler available - period
  • Deep, rich big block sound outside and relatively quiet interior
  • Convergent Flow Technology means dramatically more efficient exhaust flow
  • Baffled and chambered design means optimal volumetric efficiency
  • Features straight design which improves exhaust flow to increase torque and horsepower
  • Dyno-tested
  • Direct fit by vehicle year, make and model
  • Made in America
  • Makes significant improvements in low to mid-range
  • Comes in universal oval, round or in a race muffler style
  • SKU#: G2755131
  • Brand: Gibson
  • Product Fit: Universal
  • Quantity Sold: Sold Individually
  • Sound Level: Aggressive
  • Recommended Use: Performance
  • Anticipated Ship Out Time: 2-3 business days
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Fits the following GMC K15 Years:
  • 1975-1978 | All Engines | All Submodels