Holley 300-131 Single Plane Mid-Rise Carbureted Intake Manifold GM LS3/L92 Rectangle Port Features:

• Designed for performance-minded LS engines with a 2,500-7,000 rpm power band
• Cast aluminum construction with consistent wall thickness throughout and strong mounting flanges
• Constant cross-sectional area produces a broad torque curve
• Accepts a carburetor with a Holley 4150 square bore flange
• The lowest carb flange height possible for improved hood clearance
• Ideal manifold for the centrifugal blower, turbocharger or nitrous power adders
• RPM Range: 2,500 - 7,000
• Weight: 11.5 lbs
• Port Size: 2.50"H x 1.15"W
• Carb Mounting Flange Height from Lifter Valley Cover Flange: 5.42"
• Carb Flange: Standard Holley 4150, accepts up to 1.75" diameter throttle bores
• Vacuum Port Thread: 3/8" NPT
• MAP Sensor Port Thread: 1/8" NPT

Holley 300-131 Single Plane Mid-Rise Carbureted Intake Manifold GM LS3/L92 Rectangle Port Includes:

• Zinc plated hex head cap mounting bolts & washers
• 3/8" NPT hex socket pipe plug (to block the manifold vacuum port if necessary)
• 1/8" NPT hex socket pipe plug (to block the MAP sensor port if necessary)
• (8) Viton O-ring cylinder head mounting flange gaskets

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

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