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This Gibson Headers deliver dyno-tuned power for 1996-1999 Chevrolet C2500 C3500 K2500 K3500 and GMC C2500 C3500 K2500 K3500 trucks with 7.4L engines including Cheyenne Silverado Suburban Sierra models. These 1-3/4 inch 16-gauge stainless steel headers replace factory manifolds using the stock crossover pipe for easy bolt-on gains in horsepower torque and engine breathing at low to mid-range highway RPMs. Ceramic coating keeps underhood temperatures low while ensuring durability on street or off-road.
Key Features
- Heavy-Duty Construction: 1-3/4in primaries from 16-gauge T304 stainless steel with 3/8in laser-cut port flanges prevent warping leaks.
- Ceramic Coating: Reduces radiant heat for cooler engine bay temperatures and extended component life.
- Direct Fit Replacement: Bolts in place of stock manifolds retains factory crossover pipe no modifications needed suits lowered or raised trucks.
- 16-gauge T304 stainless steel tubing 1-3/4in primaries with ceramic coating and 3/8in thick laser-cut flanges.
- Dyno-Tuned Design: Engineered for maximum usable horsepower and torque at low and mid-range RPMs improving throttle response and highway performance.
- Uses OEM-style connections includes all necessary premium gaskets and hardware.
Fitment
| Years | Make | Model | Application |
|---|---|---|---|
| 1996-1999 | Chevrolet | C2500 | Silverado, 7.4L |
| 1996-1999 | Chevrolet | K2500 | Silverado, 7.4L |
| 1996-1999 | GMC | C2500 | Sierra, 7.4L |
| 1996-1999 | GMC | K2500 | Sierra, 7.4L |
Specifications
| Manufacturer | Gibson |
|---|---|
| Manufacturer Part Number | GP113S-C |
| 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 | Incl. Stainless Y-Pipe, With Out Air Injection. Emission Complaint 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 GP113S-C
- 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.
Related Gibson Products
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- Gibson 01-03 Chevrolet Silverado 3500 Base 8.1L 1-3/4in 16 Gauge Performance Header - Stainless
Browse the Gibson collection for related exhaust systems and components.
Frequently Asked Questions
Which vehicles fit Gibson GIBGP113S-C?
Gibson GIBGP113S-C is listed for 1996-1999 Chevrolet C2500, 1996-1999 Chevrolet K2500, 1996-1999 GMC C2500, and 1996-1999 GMC K2500. 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 GIBGP113S-C?
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 GIBGP113S-C?
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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