BM 1000 Series Intake ManifoldSmall Block ChevySingle Plane4150-Series Carb Flange5.750'' HeightFits Brodix -8, -10, -11, -11X & Track 1 Series HeadsUse Fel Pro 1206 or Cometic C5414 Gasket4000-8000 RPM Range 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.