Gibson 01-03 Chevrolet Silverado 3500 Base 8.1L 1-3/4in 16 Gauge Performance Header - Stainless Gibson GIBGP131S
Gibson 01-03 Chevrolet Silverado 3500 Base 8.1L 1-3/4in 16 Gauge Performance Header - Stainless Gibson GIBGP131S
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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
4 Units In Stock - Ships Next Business Day
$ 1,496.70
$ 1,496.70

SKU: GP131S | UPC: 677418005899

Gibson 2001-2003 Chevrolet Silverado 3500 Base 8.1L 1-3/4in 16 Gauge Performance Header - Stainless

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

  • Dyno-Tuned Engineering: Tested for maximum usable horsepower and torque gains at highway speeds and low RPM ranges
  • 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
  • Lifetime Limited Warranty: 50-state street legal, meets EPA and CARB standards, preserves factory warranty

Product Notes

  • No welding required for installation
  • Suits street and off-road applications
  • Ships standard ground with heavy-duty packaging

Installation Notes

  • Professional installation recommended.
  • Bolt-on design uses existing OEM connections and hardware provided
  • Compatible with factory exhaust components including crossover pipe

This Part Fits

Year Make Model Submodel
2002-2003 Chevrolet Avalanche 2500 Base
2001-2003 Chevrolet Silverado 2500 HD Base
2001-2003 Chevrolet Silverado 2500 HD LS
2001-2003 Chevrolet Silverado 2500 HD LT
2001-2003 Chevrolet Silverado 3500 Base
2001-2003 Chevrolet Silverado 3500 LS
2001-2003 Chevrolet Silverado 3500 LT
2001 Chevrolet Suburban 2500 Base
2001-2003 Chevrolet Suburban 2500 LS
2001-2003 Chevrolet Suburban 2500 LT
2002-2003 GMC Sierra 2500 HD Base
2001-2002 GMC Sierra 2500 HD SL
2001-2003 GMC Sierra 2500 HD SLE
2001-2003 GMC Sierra 2500 HD SLT
2003 GMC Sierra 2500 HD WT
2002-2003 GMC Sierra 3500 Base
2001-2002 GMC Sierra 3500 SL
2001-2003 GMC Sierra 3500 SLE
2001-2003 GMC Sierra 3500 SLT
2001-2003 GMC Yukon XL 2500 SLE
2001-2003 GMC Yukon XL 2500 SLT

Why Choose Gibson?

  • Proven track record in performance exhaust since 1997
  • Stainless steel build lasts under heavy use
  • Dyno-tested for truck-specific power delivery

Frequently Asked Questions

  • Q: Will GP131S fit my 2001-2003 Silverado 3500 with 8.1L Vortec?
    A: Yes, direct fit for Base, LS, LT submodels and equivalent GMC Sierra 3500 models with 8.1L engine
  • Q: What material and tube size are used?
    A: 16 gauge stainless steel with 1-3/4 inch primary tubes for optimal flow and durability
  • Q: What warranty and emissions info applies?
    A: Lifetime limited warranty, 50-state legal, EPA and CARB compliant, no impact on vehicle warranty

Shipping & Handling

  • Method: Standard ground shipping
  • Availability: In stock - ships same or next business day
  • Packaging: Secure heavy-duty oversize box, 50in L x 16in W x 16in H
  • Weight: 42 lbs

Request For Information

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