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GMC K25 Exhaust System

We have 3 Items In-stock. Select a year to continue.
$333.20 List Price $578.96 Save $245.76 Availability: In Stock
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GIBSON – SWEPT SIDE CAT-BACK EXHAUST SYSTEMS

Gibson’s Swept Side cat-back exhaust system is dyno-proven to dramatically increase the power band in the 1800-3000 RPM range, giving you more horsepower, torque, fuel economy and towability with a rich, deep exhaust tone. Gibson is known as the leading manufacturer of street-legal, high performance exhaust systems for trucks, SUVs, diesels, off-road vehicles and RVs.

  • Gibson’s most popular, affordable and leading performance exhaust system
  • Stainless steel exhausts backed by a lifetime warranty
  • Patented Superflow technology means dramatically more efficient exhaust flow
  • Optimizes towing power, hill climbing and passability
  • Comes in aluminized or stainless steel
  • Proven to improve torque, horsepower (up to 20 hp) and gas mileage
  • Mandrel-bent tubing allows for continuous airflow
  • Polished stainless tips feature sleek clampless connection
  • Dyno-tested
  • Direct fit by vehicle year, make and model
  • Made in America
  • Legal in all 50 states
  • SKU#: G27315566
  • Brand: Gibson
  • Fit Note: 96.0 in. Bed, Standard Cab Pickup
  • Quantity Sold: Assembly
  • Muffler Sound Level: Moderate to Aggressive
  • Recommended Use: Performance
  • Advertised Power Gains: 15-20 h.p.
  • Anticipated Ship Out Time: 3-4 business days
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Fits the following GMC K25 Years:
  • 1978 | 8 Cyl 5.7L | Base, High Sierra, Sierra Classic, Sierra Grande
  • 1977-1978 | 8 Cyl 5.0L | Base, High Sierra, Sierra Classic, Sierra Grande
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$307.29 List Price $362.60 Save $55.31 Availability: In Stock
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HEARTTHROB EXHAUST – MANIFOLD-BACK DUAL EXIT EXHAUST SYSTEMS

A power-filled and fire-breathing exhaust tone is what you will hear from every Heartthrob Manifold Back Duel Exit Exhaust System. Heartthrob Exhaust makes this exhaust system for a wide selection of older vehicles. Bolting this effective exhaust system on your classic vehicle will rejuvenate your ride and make you want to drive it even more! The manifold-back duel-exit design assists with maximizing exhaust flow for a noticeable horsepower and torque boost and the powerful sound of it is sure to put a smile on your face. Heartthrob Exhausts are manufactured in a high tech facility in Minnesota with state-of-the-art computer based CNC manufacturing tooling and equipment. Run by a staff of 30 of dutiful employees, all of whom are knowledge filled exhaust experts, assures you will get a perfect fitting exhaust for your vehicle. This small family-owned exhaust company now has over 37 years of exhaust manufacturing experience and takes pride in every exhaust they make.

  • Manufactured in USA
  • Installs directly to your vehicle’s stock manifold
  • Glass-pack muffler tips come with front exit kits
  • Aluminized tubing is 2 ¼ inch in diameter
  • Depending on vehicle, there is a choice of split-rear exit, front exit in front of rear tires or stock exit
  • Dyno-tested and flow bench tested for quality assurance
  • Engineered for no restrictions from the mandrel bent tubing process
  • This kit is not street legal only if your vehicle was equipped with a catalytic converter when new
  • SKU#: HEA1024804
  • Brand: Heartthrob Exhaust
  • Fit Note: Extended Cab Pickup, 4WD, small block, up To 132 in. Wheelbase, greater than 132 in. longer extensions are required., Standard Cab Pickup, 4WD, small block, up To 132 in. Wheelbase, greater than 132 in. longer extensions are required.
  • Emissions: For off road/track use
  • Quantity Sold: Assembly
  • Muffler Sound Level: Aggressive
  • Recommended Use: Performance
  • Anticipated Ship Out Time: 1-2 Business Days
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Fits the following GMC K25 Years:
  • 1977-1978 | 8 Cyl 5.0L | Base, High Sierra, Sierra Classic, Sierra Grande
  • 1975-1978 | 8 Cyl 6.6L | Base, High Sierra, Sierra Classic, Sierra Grande
$218.65 List Price $258.01 Save $39.36 Availability: In Stock
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Hooker Competition Exhaust System is designed to fit Hooker Competition headers or manifolds. It features large diameter, mandrel-bent, and 16-gauge aluminized steel tubing for improved efficiency, less back-pressure, maximum flow, and longer life.

Note:

    Specifications:

    • Header-back system
    • Dual split side exit
    • 2.25 in. piping diameter
    • Pipes, mounting hardware included
    • Muffler not included; Designed for used with Hooker Competition Headers PN 2453HKR; Modifications required if used with other headers
  • SKU#: H2616526
  • Brand: Hooker
  • Fit Note: 96.0 in. Bed, Extended Cab Pickup, 96.0 in. Bed, Standard Cab Pickup
  • Quantity Sold: Kit
  • Muffler Sound Level: Not Specified
  • Recommended Use: Performance
  • Anticipated Ship Out Time: 1-2 Business Days
  • Attachment Style: Clamp-On
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Fits the following GMC K25 Years:
  • 1977-1978 | 8 Cyl 5.0L | Base, High Sierra, Sierra Classic, Sierra Grande
  • 1975-1978 | 8 Cyl 6.6L | Base, High Sierra, Sierra Classic, Sierra Grande