Gibson 01-03 Chevrolet Silverado 3500 Base 8.1L 1-3/4in 16 Gauge Performance Header - Stainless - Gibson GP131S
Gibson 01-03 Chevrolet Silverado 3500 Base 8.1L 1-3/4in 16 Gauge Performance Header - Stainless - Gibson GP131S
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Gibson 01-03 Chevrolet Silverado 3500 Base 8.1L 1-3/4in 16 Gauge Performance Header - Stainless

Gibson
GIBGP131S
677418005899
Headers & Manifolds
1 Units In Stock
$ 679.57
$ 679.57

This Gibson GP131S performance headers deliver dyno-tuned power gains for 2001-2003 Chevrolet Silverado 3500, 2500 HD, Avalanche 2500, Suburban 2500 and GMC Sierra 2500 HD, 3500, Yukon XL 2500 with 8.1L engines. These stainless steel headers replace factory manifolds to increase horsepower and torque at low and mid-range RPM while reducing engine temperatures. Direct bolt-on design uses stock crossover pipe for easy upgrade on street or off-road trucks.

Key Features

  • 1-3/4in 16 Gauge Stainless Steel: Durable construction improves exhaust flow, engine breathing, and heat dissipation for cooler operation.
  • Direct Factory Manifold Replacement: Bolt-on fit with OEM-style connections and stock crossover pipe compatibility for lowered or raised vehicles.
  • 3/8in Heavy Duty Laser Cut Flanges: Precision flanges prevent warping or leaks with premium gaskets and hardware included.
  • 16 gauge stainless steel with 1-3/4 inch primary tubes for optimal flow and durability.
  • Dyno-Tuned Engineering: Tested for maximum usable horsepower and torque gains at highway speeds and low RPM ranges.
  • Bolt-on design uses existing OEM connections and hardware provided.

Fitment

Years Make Model Application
2002-2003 Chevrolet Avalanche 2500 8.1L
2001-2003 Chevrolet Silverado 2500 HD 8.1L
2001-2003 Chevrolet Suburban 2500 8.1L
2001-2003 GMC Sierra 2500 HD 8.1L
2001-2003 GMC Yukon XL 2500 8.1L

Specifications

Manufacturer Gibson
Manufacturer Part Number GP131S
Product Type Headers &, Manifolds
Fitment Type Vehicle specific
Tubing Diameter 1-3/4-in. Stainless 16-gauge mandrel bent tubing.
Header Features Short Tube Style Header, Direct Fit, Bolt-On, Heavy duty laser cut flanges, Premium gaskets and all hardware included, No Welding, Attaches to the OEM crossover pipe
Footnote Emission Compliant Carb EO# D-411-13
Warranty Lifetime Limited Warranty

What's Included

  • One new Gibson headers &, manifolds in the exact configuration identified by manufacturer part number GP131S
  • Hardware and accessories only when supplied for this exact part number

About Gibson

Gibson develops vehicle-specific and universal exhaust components for street, truck, SUV, and performance applications. Selection and installation requirements remain exact-part-number specific.

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Frequently Asked Questions

Which vehicles fit Gibson GIBGP131S?
Gibson GIBGP131S is listed for 2001-2003 Chevrolet Silverado 2500 HD, 2001-2003 Chevrolet Suburban 2500, 2001-2003 GMC Sierra 2500 HD, 2001-2003 GMC Yukon XL 2500, and 2002-2003 Chevrolet Avalanche 2500. Confirm the exact engine, trim, drivetrain, body or cab configuration, exhaust layout, and every application note before ordering.

What should I verify before ordering Gibson GIBGP131S?
Match the exact part number, system type, material, finish, tubing and connection diameters, exhaust configuration, package contents, and current manufacturer notes shown in this listing.

What should be checked when installing Gibson GIBGP131S?
Verify all interfaces, hanger positions, tip and body clearances, clamp or fastener torque, leak-free operation, and local emissions requirements. Reinspect the system after its first heat cycle.

Installation Instructions

Follow the current Gibson instructions and vehicle service information for this exact part number. Work on a cool exhaust, support the vehicle safely, confirm all interfaces and clearances, align the system before final tightening, test for leaks, and inspect the installation again after the first heat cycle.

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