The use of one tapered plenum to accommodate one bank of cylinders accomplishes both problems. The entire volume of incoming air is distributed to only four cylinders and the tapered shape of the plenum help increased air velocity directed to each of the intake runner ports.

• Our dual plenum design features extremely long 12-3/4 inch runners to develop low-end torque making this intake an ideal street intake.
• Our latest release of fabricated Dual Plenum intake manifolds for GM LS1/2/6 and LS3/L92 engines, This unique design of utilizing two plenums solves two common problems experienced with many intakes increased airflow and even dispersion of air to intake ports.
• Holley continues to push the envelope of intake design with its latest offering, The unique look of this intake will surely stand out from the crowd!.
• These intake are finished in our familiar silver and black anodized finishes for durability and good looks, Our 3/8 inch fuel rail kit include a laser engrave Sniper logo and are capable of supporting 750+ horsepower.
• Long Intake runner lengths (12.75 inches ) offering low end torque and operating range of 1600-6800 RPM.
• Intake runners with tapered top is designed to increase air velocity and more evenly distribute airflow to all 8 cylinders improving performance and throttle response.
• 100 percent TIG welded for strength and durability.
• Product includes all gaskets and hardware for a hassle-free installation.
• 3mm (1/8 inch) thick T6061 sheet aluminum construction for maximum durability.
• Twin 92mm throttle bore openings for increased air flow.
• Dual plenum design ideal for street max effort engines and boosted applications.
• Long Intake runner lengths (12.75 inches) offering low end torque and operating range of 1600-6800 RPM.
• Includes 3/8 inch Fuel rail kits (Sniper logo laser engraved).
• Black Finish creates stealthy under-hood styling.

Details:

• Basic Operating RPM Range: 1500-6500 RPM
• Carburetor Studs Included: No
• CNC Ported: No
• Color: Black
• Construction: Fabricated
• Cylinder Head Port Shape: Cathedral
• Deck Height: 9.24 Inch
• EGR Port: No
• Emission Code: 4
• Engine: GM LS1/LS2/LS6
• Front Maximum Height: 11.802 Inch
• Front Width: 19.4292 inch
• Fuel Injectors Included: No
• Fuel Rail(s) Included: Yes
• Fuel System Type: EFI
• Gasket Or Seal Included: Yes
• Grade Type: Performance
• Injector Style Provision: LS1/LS6 EV1 Jetronic, LS2 EV6 USCAR
• Intake Port Gasket(s) Included: Yes
• Manifold Type: Fabricated
• Material: Aluminum
• Nitrous Bung(s) Included: No
• Plenum Finish: Black
• Rear Maximum Height: 9.738 Inch
• Rear Width: 13.2844 inch
• Recommended Use: Forced Induction
• Removable Runners: No
• Removable Top/Lid: No
• Runner Length: 4.921 inch (125mm)
• Single Or Dual Plane Type: Single Plane
• Style: EFI
• Throttle Body Bore Diameter: 92 Millimeter
• Throttle Body Gasket Included: No
• Throttle Body Included: No
• Throttle Bore: 92mm
• Vacuum Ports: (3) 1/8 inch-28BSPT & (1) 1/4 inch-19BSPT
• Warranty: Manufacturer's Limited 90 Day Warranty