Chevy Small Block Vortec Dual Plane Aluminum Intake Manifold for 305 & 350 V8 Engines Square Bore - Satin

Upgrade or convert your Small Block Chevy Vortec engine with the Top Street Performance Satin Dual Plane Aluminum Intake Manifold, engineered specifically for 1996–2002 Chevrolet 305 and 350 Vortec V8 engines equipped with factory Vortec cylinder heads. Whether you're performing a carburetor conversion on a fuel-injected Vortec engine, replacing a damaged factory intake, or building a street-performance Vortec combination from the ground up, this manifold delivers the Vortec-specific fitment, dual-plane street performance, and carburetor compatibility your build requires.

The Vortec-specific 8-bolt intake pattern ensures proper sealing and fitment with factory Vortec cast iron cylinder heads and Vortec-pattern aluminum heads — and will not fit standard 12-bolt small block Chevy intake patterns. This is a critical distinction: standard SBC intakes will not seal correctly on Vortec heads, making this Vortec-specific manifold the correct solution for any carbureted 305 or 350 Vortec application. A square-bore carburetor adapter is included, expanding carburetor compatibility right out of the box.

Designed to operate across a 1,500–6,700 RPM range, the dual-plane runner layout delivers strong low- and mid-range torque and responsive throttle feel across the powerband where street-driven trucks, SUVs, and performance vehicles spend most of their time. Whether you're running a Chevrolet C/K truck, Tahoe, Suburban, GMC Sierra, or Yukon with a 305 or 350 Vortec, this manifold provides the airflow, drivability, and carburetor compatibility needed for reliable everyday street performance.

Constructed from lightweight aluminum, this Vortec intake manifold reduces engine weight while dissipating heat more efficiently than heavier cast-iron alternatives. The satin finish delivers a clean, performance-oriented appearance that complements engine bays in trucks, SUVs, muscle cars, street rods, and restoration builds running Vortec V8 power.

 

Vortec-Specific Dual-Plane Intake Technology
The dual-plane runner configuration divides the intake plenum into two separate planes, each feeding alternating cylinders to maintain strong airflow velocity from idle through 6,700 RPM. This layout promotes balanced air-fuel distribution across all eight cylinders of the Vortec V8, supporting the consistent low- and mid-range torque delivery that makes this manifold ideal for street-driven trucks, SUVs, and performance builds. The Vortec-specific 8-bolt intake bolt pattern ensures a proper seal with 1996+ Vortec cylinder heads — a design requirement that standard small block Chevy intakes cannot meet. At 4.730 inches tall with an oval intake port shape matched to Vortec head geometry, this manifold optimizes airflow through the intake tract for responsive throttle feel and dependable street drivability across the full operating range.

Performance Benefits
Engineered for the 5.0L L30 305 Vortec and 5.7L L31 350 Vortec V8, this dual-plane intake manifold supports improved airflow and stronger street torque compared to the factory fuel injection intake configuration. The 1,500–6,700 RPM operating range covers the complete spectrum of street driving demands, making this manifold an excellent performer for daily drivers, weekend trucks, SUV builds, and mild street performance applications. It is particularly well-suited for carburetor conversion builds where a Vortec engine is being converted from factory fuel injection to a carbureted setup — one of the most common Vortec performance modifications performed today.

COMPATIBLE WITH
CHEVROLET SMALL BLOCK V8 VORTEC ENGINES
• 5.0 L / 305 in3 (L30 Vortec)
• 5.7 L / 350 in3 (L31 Vortec)
Compatible with any Small Block Chevrolet engine equipped with 1996+ Vortec cylinder heads utilizing the Vortec 8-bolt intake pattern.

COMMON VEHICLE APPLICATIONS
Chevrolet C/K 1500
Chevrolet C/K 2500
GMC Sierra 1500
GMC Sierra 2500
Chevrolet Tahoe
Chevrolet Suburban
GMC Yukon
Chevrolet Express Van
GMC Savana Van

NOTES
• Fits Small Block Chevrolet engines equipped with 1996–2002 Vortec 8-bolt cylinder heads.
• Compatible with 5.0L L30 and 5.7L L31 Vortec engines.
• Can be used on earlier Gen I Small Block Chevrolet engines when converted to Vortec cylinder heads.
• Designed for 4150/4160 square-bore carburetors.
• Includes rear water crossover and threaded accessory ports.
• Vortec engines require an external water bypass connection using a 5/8-inch heater hose.
• Not compatible with traditional 12-bolt Small Block Chevrolet cylinder heads.
• Not compatible with LS or LT engines.

SPECIFICATIONS
Basic Operating RPM Range: 1,500-6,700 RPM
Carburetor Quantity: 1
CNC Ported: No
Color: Satin
Deck Height: Standard
EGR: No
Intake Manifold Height: 4.730 in.
Fuel System Type: Carbureted
Gasket Or Seal Included: No
Grade Type: Performance
Intake Port Shape: Oval
Material: Aluminum
Single Or Dual Plane Type: Dual Plane