Overview Its dual plane design makes it perfect for low end torque, yet it still pulls all the way to 6,500 RPM! Our O-ring cylinder head mounting flange gaskets provide an OEM style seal and make installation a snap. Bolt one on today! | Got an LS engine to get running? Nothing is easier than bolting on a carburetor. Holley's dual plane carbureted intake for GM's LS engines will help you get on the streets quick! All GM LS Gen III or IV engines equipped with LS1/LS2/LS6 style cathedral port cylinder heads. Includes mounting bolts & washers. NOTE: These Dual-Plane Intake Manifolds are NOT legal for sale or use on engines with pollution controlled equipment Features Optimized runner layout and constant cross sectional area - broad torque curve, best vehicle performance from 1500-6500 RPM Cast aluminum construction and efficient casting design for light weight, consistent wall thicknesses and improved casting quality Includes Viton® O-rings - Viton® is a registered trademark of DuPont Performance Elastomers Great for carbureted or throttle body EFI street applications 1500-6500 RPM power band Port size - 2.72" height x 1" wide Height (front) - 5.07" from front lifter valley cover to carb mounting flange 4150 Square bore flange Minimum carb flange height means it fits in vehicles with minimal or no hood modifications Mounting flange gasket type - O-ring Weighs 15.14 lbs. Height (rear) - 6.14" from rear lifter valley cover to carb mounting flange
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