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GMC K25 Exhaust System

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GMC K25 Exhaust System, Gibson Swept Side Exhaust System - Natural, Aluminized Steel

$333.20 $607.91 You Save $274.71 (45%)
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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
  • Series: Gibson Swept Side
  • Material: Aluminized Steel
  • Color/Finish: Natural
  • Quantity Sold: Assembly
  • Muffler Sound Level: Moderate to Aggressive
  • Recommended Use: Performance
  • Advertised Power Gains: 15-20 h.p.
  • Anticipated Ship Out Time: 1-2 Business Days
  • Attachment Style: Bolt-On
  • Exit Location: Behind Rear Tire
  • Exit Quantity: Single
  • Includes: Pipes, zinc-plated factory style hangers, heavy-duty clamps
  • Main Piping Diameter: 3.0 in.
  • Muffler Configuration: Single Inlet and Outlet
  • Muffler Finish: Natural
  • Muffler Material: Aluminized Steel
  • Muffler Quantity: One
  • Muffler Type: Baffled and Chambered
  • System Type: Cat-Back
  • Tip Cut: Angle
  • Tip Diameter: 3.5 in.
  • Tip Edge Style: Non-Rolled
  • Tip Finish: Polished
  • Tip Length: 3.5 in.
  • Tip Material: Stainless Steel
  • Tip Quantity: One
  • Tip Shape: Round
  • Warranty: Lifetime Gibson limited warranty
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Fits the following GMC K25 Years

  • 1976-1978 | Base | 8 Cyl 7.4L
  • 1976-1978 | High Sierra | 8 Cyl 7.4L
  • 1976-1978 | Sierra Classic | 8 Cyl 7.4L
  • 1976-1978 | Sierra Grande | 8 Cyl 7.4L
  • 1977-1978 | Base | 8 Cyl 5.0L
  • 1977-1978 | High Sierra | 8 Cyl 5.0L
  • 1977-1978 | Sierra Classic | 8 Cyl 5.0L
  • 1977-1978 | Sierra Grande | 8 Cyl 5.0L
  • 1978 | Base | 8 Cyl 5.7L
  • 1978 | High Sierra | 8 Cyl 5.7L
  • 1978 | Sierra Classic | 8 Cyl 5.7L
  • 1978 | Sierra Grande | 8 Cyl 5.7L
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GMC K25 Exhaust System, Heartthrob Exhaust Manifold Dual Exhaust System - Natural, Aluminized Steel

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$234.27 $276.44 You Save $42.17 (15%)
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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#: HEA4804GP
  • Brand: Heartthrob Exhaust
  • Series: Heartthrob Exhaust Manifold Dual
  • Material: Aluminized Steel
  • Color/Finish: Natural
  • Emissions: Not Street Legal In Ca Or Any State Adopting Ca Emissions - Intended For Closed Circuit Competition Use Only
  • Quantity Sold: Assembly
  • Muffler Sound Level: Aggressive
  • Recommended Use: Performance
  • Anticipated Ship Out Time: 1-2 Business Days
  • Attachment Style: Clamp-On
  • Downpipe Diameter: 2.25 in.
  • Exit Location: Behind Each Rear Tire
  • Exit Quantity: Dual
  • Main Piping Diameter: 2.25 in.
  • Muffler Configuration: Single Inlet and Outlet
  • Muffler Finish: Natural
  • Muffler Material: Aluminized Steel
  • Muffler Quantity: Two
  • Muffler Type: Straight-Through
  • Notes: For vehicles with stock manifolds, off-road for vehicles originally equipped with converter. Includes all clamps, hangers, tubing, and hardware. Muffler has 18 in. body.
  • System Type: Manifold-Back
  • Tip Cut: Tips Not Included
  • Tip Diameter: Tips Not Included
  • Tip Edge Style: Tips Not Included
  • Tip Finish: Tips Not Included
  • Tip Length: Tips Not Included
  • Tip Material: Tips Not Included
  • Tip Quantity: Tips Not Included
  • Tip Shape: Tips Not Included
  • Warranty: 1-year Heartthrob Exhaust warranty
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Fits the following GMC K25 Years

  • 1975-1978 | Base | 8 Cyl 5.7L
  • 1975-1978 | Base | 8 Cyl 6.6L
  • 1975-1978 | High Sierra | 8 Cyl 5.7L
  • 1975-1978 | High Sierra | 8 Cyl 6.6L
  • 1975-1978 | Sierra Classic | 8 Cyl 5.7L
  • 1975-1978 | Sierra Classic | 8 Cyl 6.6L
  • 1975-1978 | Sierra Grande | 8 Cyl 5.7L
  • 1975-1978 | Sierra Grande | 8 Cyl 6.6L
  • 1977-1978 | Base | 8 Cyl 5.0L
  • 1977-1978 | High Sierra | 8 Cyl 5.0L
  • 1977-1978 | Sierra Classic | 8 Cyl 5.0L
  • 1977-1978 | Sierra Grande | 8 Cyl 5.0L
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GMC K25 Exhaust System, Flowtech Super Street Exhaust System - Natural, Aluminized Steel, Direct Fit

$166.61 $196.60 You Save $29.99 (15%)
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FLOWTECH SUPER STREET DUAL EXHAUST PIPE KIT

Flowtech Super Street Dual exhaust pipe kit offers a top-quality, custom fit dual exhaust pipe kit at a price that couldn't be more affordable. It features fixture-formed 16-gauge tubing for increased performance, and a custom fit for both factory manifolds and aftermarket headers.

Specifications
  • Header-back exhaust system
  • Dual rear exit
  • 2.25 in. main piping diameter
  • 2.25 in. tail pipe diameter
Features
  • 16-gauge steel tubing
Notes
  • 49-state legal, not for sale or use in California; Cannot be shipped to California addresses.
  • Does not include muffler
  • Requires muffler part number 50121FLT or 50051FLT, header part number 11500FLT and manifold kit part number 52525FLT
  • Sku#: F3151525
  • Brand: Flowtech
  • Series: Flowtech Super Street
  • Material: Aluminized Steel
  • Color/Finish: Natural
  • Emissions: Not Street Legal In Ca Or Any State Adopting Ca Emissions - Intended For Closed Circuit Competition Use Only
  • Product Fit: Direct Fit
  • Quantity Sold: Kit
  • Muffler Sound Level: Aggressive
  • Recommended Use: Performance
  • Anticipated Ship Out Time: 3-4 business days
  • Attachment Style: Weld-On or Clamp-On
  • Exit Location: Split Rear
  • Exit Quantity: Dual
  • Includes: Installation Hardware
  • Main Piping Diameter: 2.25 in.
  • System Type: Header-Back
  • Warranty: 90-day Flowtech warranty
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Fits the following GMC K25 Years

  • 1975-1978 | Base | 8 Cyl 5.7L
  • 1975-1978 | Base | 8 Cyl 6.6L
  • 1975-1978 | High Sierra | 8 Cyl 5.7L
  • 1975-1978 | High Sierra | 8 Cyl 6.6L
  • 1975-1978 | Sierra Classic | 8 Cyl 5.7L
  • 1975-1978 | Sierra Classic | 8 Cyl 6.6L
  • 1975-1978 | Sierra Grande | 8 Cyl 5.7L
  • 1975-1978 | Sierra Grande | 8 Cyl 6.6L
  • 1977-1978 | Base | 8 Cyl 5.0L
  • 1977-1978 | High Sierra | 8 Cyl 5.0L
  • 1977-1978 | Sierra Classic | 8 Cyl 5.0L
  • 1977-1978 | Sierra Grande | 8 Cyl 5.0L
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