Strip Dominator Intake ManifoldBig Block Chevy 4500-8500 RPMSingle plane/open plenumHeight: 4.75" front/6.25" rearRect. port cylinder headsPort size: 2.30" tall/1.6" wideSquare flange/4150 carb mounting pad Will fit tall blocks with use of Weiand spacer plate kit 925-8204.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.CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART.