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Gibson 15-19 GMC Sierra 2500 HD Base 6.0L 3in Cat-Back Dual Split Exhaust - Stainless

SKU: GIB65648

Exhaust Systems

GIB Cat-Back - Dual Split...

Gibson 15-19 GMC Sierra 2500 HD Base 6.0L 3in Cat-Back Dual Split Exhaust - Stainless

SKU: GIB65648

Exhaust Systems

GIB Cat-Back - Dual Split...

A$2,257.11
Special Order. Contact for ETA. This item is out of stock in our warehouse and partner distribution centres. In some cases, this may be due to not having live inventory feeds available for all suppliers. Please contact us before ordering if you need to meet a specific deadline.

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Description

Truck/Suv

For the enthusiast who wants an awesome look and aggressive throaty sound this Dual Split Cat back exhaust is for you. Gibson Exhaust Systems decrease backpressure and produce more torque and increased horsepower. Typical gains average of 15-20 horsepower. Stainless dual Tip exit straight out the back. Works with most bumpers, roll pans and trailer hitches. Exhaust sound is louder under towing conditions. Hassle Free bolt- on installation. No welding required. Backed by a Lifetime Limited Warranty.

Additional Information

Cat-Back Dual Split Exhaust System; Stainless

Part Type

Exhaust System Kit

Data: v4.2 - Upd: 2026-11-10 23:09:38

Features

  • Baffled/Chambered Muffler; No Internal Packing
  • Hassle Free Easy Bolt-On Installation
  • Incl. Hardware/Factory Style Hangers For Easy Bolt-On Install
  • Lifetime Limited Warranty
  • Minimal Interior Drone - Aggressive Sound
  • Polished Stainless Steel Slash-Cut Tips
  • Stainless Steel Mandrel Bent Tubing
  • Superflowâ„¢ Muffler

Important Notice relating to US Domestic Market Trucks & Pickups

Many US-market trucks and pickups are available in multiple cab and bed-length configurations (e.g., Single Cab, Extended Cab, Double/Crew Cab, CrewMax, 5.5ft/6.5ft/8ft beds, etc.). Exhaust system fitment can vary between these chassis versions.

Where available, we list all compatible vehicles, cab types, and bed lengths in the product description. However, depending on your exact configuration, some systems may require optional extension/mid-pipes or minor modification for correct fitment.

Because of these variations, please carefully check your cab configuration and bed length before purchasing. If you are unsure, or if your vehicle has been modified, please reach out to a StreetFX agent.

(keyword: cat-back)

Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.

Specifications

Product Downloads

# Document Type Download
1. Installation Instructions

Installation guides, warranty details, and other supporting documents are provided by the supplier. In some cases, these files may originate from regions outside your locale, meaning instructions, warranty procedures, and images may not fully align with your specific vehicle or region (e.g., LHD vs. RHD differences, return policies, etc.). If you need clarification, please contact a StreetFX support agent.

Data: v2 - Desc: v4.2 - Upd: 2026-11-10 04:18:57

Reference Information

Reference Data (Provide these details to our support team)
Brand Name/s Gibson, GIBSON EXHAUST, Gibson Performance Exhaust
StreetFX SKU gib65648
SFX Item ID 4083442
Accounting SKU gib-65648
Manufacturer SKU 65648
Manufacturer UPC 677418024456
Alternative References 65648, GIB-65648

Exhaust System, Dual Extreme, Cat-back, Single In/Dual Out, Stainless, Split Rear Exit, Chevy, GMC, 6.0L, Kit

Gibson Dual Extreme exhaust systems are perfect for the drivers who want to take their vehicle to the next level. This dual bolt-on cat-back system exits behind the rear tires at an aggressive angle with a powerful exhaust tone. Add bold street looks with powerful dyno-tested and tuned street performance gains. Order the Dual Extreme exhaust system designed to fit your application.

Additional kit features:
• Aluminized heavy-duty or stainless steel tubing for extended durability
• Mandrel-bent tubing maintains constant exhaust flow through each bend for outstanding performance
• Superflow Performance muffler
• Polished T304 stainless steel tip with clampless connection design
• Zinc plated hangers and clamps
• Available in configurations for fitment on different makes and models

Product Attributes
UPC677418024456
BrandGibson Performance Exhaust
Tip CutSlant
QuantitySold as a kit.
Part TypeExhaust Systems
Tip ShapeRound
Tip FinishPolished
Exhaust TypeSingle in/Dual out
Product LineGibson Dual Extreme Exhaust Systems
System StyleCat-back
Tip IncludedYes
Tip Material304 stainless steel
Tip Quantity2
Exit LocationSplit rear
Muffler StyleBaffled and chambered
System FinishNatural
Inlet Quantity1
Muffler FinishNatural
Tip Edge StyleRolled edge
System Material409 stainless steel
Muffler IncludedYes
Muffler Material409 stainless steel
Muffler QuantityOne
Hardware IncludedYes
Special AttentionIt is illegal to install parts or components that bypass, defeat, or render inoperative the manufacturers’ technology and design necessary to reduce vehicle emissions to meet state and federal Clean Air Act standards.
Muffler ConfigurationSingle inlet/Dual outlet
Tip Outlet Size (in.)4.00
Tailpipe Diameter (in.)3.00 in.
Manufacturer's Part Number65648
Catalytic Converter(s) IncludedNo
Intermediate Pipe Diameter (in.)3.50 in.

Manufacturer Attributes
Muffler Body Length 24.000 in.
Tubing Diameter 3.000 in.
Inlet Inside Diameter 3.500 in.
Tail Pipe Diameter 4.000 in.
Tip Diameter 4.000 in.
Exhaust Type Cat-Back
Material Stainless Steel
Exit Position Straight Out Back
Manufacturer Designation Dual Split Exhaust System
Product Class Exhaust System Kit
Construction/Type Cat-Back Dual Split Exhaust System; Stainless
Product Outline Stainless Steel Mandrel Bent Tubing
Superflow™ Muffler
Baffled/Chambered Muffler; No Internal Packing
Minimal Interior Drone - Aggressive Sound
Polished Stainless Steel Slash-Cut Tips
Hassle Free Easy Bolt-On Installation
Incl. Hardware/Factory Style Hangers For Easy Bolt-On Install
Lifetime Limited Warranty
Vehicle Brief Gibson Exhaust System Kit
Market Description For the enthusiast who wants an awesome look and aggressive throaty sound this Dual Split Cat back exhaust is for you. Gibson Exhaust Systems decrease backpressure and produce more torque and increased horsepower. Typical gains average of 15-20 horsepower. Stainless dual Tip exit straight out the back. Works with most bumpers, roll pans and trailer hitches. Exhaust sound is louder under towing conditions. Hassle Free bolt- on installation. No welding required. Backed by a Lifetime Limited Warranty.

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