High-Performance Upper Intake Manifold Kit

This upper intake manifold kit is compatible with Chevrolet, GMC, and Workhorse vehicles equipped with 5.0L or 5.7L V8 Vortec gasoline engines, including:

• Chevrolet: C1500/K1500, C2500/K2500, C3500, Suburban, Tahoe, Express, Silverado, and cargo van models (1996–2004)
• GMC: C1500/K1500, Suburban, Yukon, C2500/K2500, K3500, Savana, and commercial models (1996–2002)
• Workhorse: P30, P32, P42 Custom Chassis, and FasTrack models (1999–2005)

To confirm 100% exact fitment, please match the OE Part Numbers listed in our specifications against those on your original manifold, or contact us with your VIN before purchasing.

The upper intake manifold is the primary component that distributes fuel-air mixture from the carburetor or fuel injection system to the lower intake manifold and individual cylinder heads on your V8 engine. It performs several critical functions:

• Fuel-Air Distribution: Directs the fuel-air mixture evenly to each cylinder, ensuring consistent combustion and power delivery
• Engine Breathing: Optimized internal passages maximize volumetric efficiency and airflow, improving power output and throttle response
• Pressure Control: Maintains correct intake system pressure to support proper fuel injection timing and atomization
• Structural Support: Provides a rigid mounting point for fuel injectors, intake runners, and accessory components like the EGR valve

A damaged or worn upper intake manifold directly compromises engine performance, fuel economy, and cold-start reliability.

Common symptoms of a worn or failing upper intake manifold include:

• Visible coolant leaks from under the intake manifold area
• Rough idle or hesitation during acceleration
• Check engine light — particularly P0400, P0401 (EGR codes) or vacuum leak codes
• Loss of power or reduced fuel economy
• Hissing or sucking sounds indicating vacuum leaks
• Engine overheating due to blocked coolant passages in the manifold
• Visible cracks, corrosion, or deterioration of the manifold casting

Have your intake system inspected promptly if any of these symptoms appear to prevent engine damage.

Yes — this upper intake manifold kit is compatible with both rear-wheel drive (RWD) and four-wheel drive (4WD) variants of the listed Chevrolet, GMC, and Workhorse models. The intake manifold fitment is the same regardless of drivetrain configuration.

What matters for compatibility is: your vehicle model, model year, and engine displacement (5.0L or 5.7L V8 Vortec). We always recommend confirming fitment by matching the OE Part Number on your original component or providing your VIN before ordering.

This complete kit includes everything needed for installation:

• 1x Upper Intake Manifold Assembly
• 1x Complete Gaskets Kit — includes all required intake manifold gaskets
• 1x Accessories Pack — fasteners, clamps, and miscellaneous installation hardware

This is a single manifold unit suitable for one vehicle. The kit includes all components needed to complete a proper installation.

While some experienced DIY mechanics may attempt intake manifold replacement, professional installation by a qualified technician is strongly recommended. Upper intake manifold replacement requires:

• Careful removal of multiple engine bay components to access the manifold
• Proper gasket sealing technique to prevent vacuum and coolant leaks
• Correct torque sequence and specifications for all fasteners
• System pressure testing to confirm no leaks following installation
• Knowledge of coolant fill and air purging procedures on V8 Vortec engines
• Professional installation is required to validate warranty coverage

Improper installation can result in vacuum leaks, coolant loss, overheating, or engine performance issues. Note: Detailed installation instructions are available separately.

This complete kit includes the manifold, gaskets, and basic accessories. Depending on your specific vehicle and condition, a technician may require:

• Additional fasteners if original bolts are damaged during removal
• Coolant (depending on how much spillage occurs during removal)
• Throttle body gasket (if removal is required for manifold clearance on your year model)
• Intake air temperature sensor gasket (on some model years)

A qualified technician will inspect your engine and advise on any supplementary parts needed. Most installations can be completed with the included kit contents alone.

Upper intake manifold replacement on a V8 Vortec engine typically requires 3–5 hours of labor, depending on:

• Specific vehicle model and engine bay layout accessibility
• Whether auxiliary components require removal (air intake, throttle body, EGR valve, etc.)
• Condition of fasteners and ease of removal
• Need for coolant system flush or pressure testing post-installation

Request a time estimate from your technician based on your vehicle's specific model year and condition.

This product includes warranty coverage under the following terms:

• Extended Warranty: 10-year coverage when installed by a fully qualified professional
• Validation: Submit a copy of the garage installation invoice within 30 days of installation to activate extended coverage
• Default Coverage: If garage invoice is not provided within 30 days, coverage defaults to a standard 1-year warranty
• Scope: Warranty covers manufacturing and material defects on the component only — labour costs and incidental expenses are excluded

If you experience any product-related issue within the warranty period, contact us with proof of professional installation and your original part number to initiate a claim.

This is a high-quality aftermarket replacement part engineered to meet or exceed OEM (Original Equipment Manufacturer) specifications. It is 100% brand new and designed as a direct replacement for the factory upper intake manifold on your Chevrolet, GMC, or Workhorse V8 Vortec engine.

It delivers the same fit, dimensional accuracy, casting quality, and engine performance characteristics as the original equipment — at a more competitive price point than a factory OEM part — without any compromise on quality, durability, or long-term reliability.

To confirm 100% compatibility before purchasing, follow these steps:

• Check Vehicle Model & Year: Confirm your vehicle is one of the listed Chevrolet, GMC, or Workhorse models and falls within the specified year ranges
• Verify Engine Type: Confirm your engine is a 5.0L or 5.7L V8 Vortec gasoline engine (not diesel)
• Match OE Part Numbers: Compare the numbers listed in our specifications against the part number on your original upper intake manifold
• Check Engine Bay Layout: Ensure your manifold configuration matches your current installation (some variations exist by model year)
• Send Us Your VIN: Our team can verify exact fitment using your Vehicle Identification Number before you purchase

Matching the OE part number on your original manifold is the most reliable method to guarantee correct fitment for your specific vehicle.