These new bare pair of CNC Ported Precision Race Engines Small Block Chevy heads include a revolutionary ultra casting designed after the Dart Pro 1 cylinder heads. Standard features are high grade aluminum alloy, bronze valve guides, valve seats for use with unleaded fuel, ends milled and drilled for accessories, and a straight spark plug angle. Intake features bolt pattern for both early and Vortec style intakes. These are the most affordable high quality aluminum cylinder heads on the market. Intake Runner Volume : 218cc. Exhaust Runner Volume : 89cc. Combustion Chamber Volume : 68cc. Intake Valve Size: 2.055. Exhaust Valve Size: 1.600. Intake Gasket : Fel-Pro 1206 or Equivalent. Header Gasket : Fel-Pro 1406 or Equivalent. Head Gaskets : 350/383 Fel-Pro 1003 , Cometic C5399, EW 111350MLS. Head Gaskets : 400/434 Fel-Pro 1004 , Cometic C5403, EW 111400MLS. Spark Plugs : NGK R5671A-7 / 4091 Hotter or colder or Equivalent. Guide Plates : Comp Cams 4808-8 5/16 or Equivalent. Head Bolt Washers : Manley 42102 , Mr. Head Bolt Torque : 70 f-lb. Rocker Stud Torque : 45 ft-lb. Max Spring Pocket Diameter : 1.560. Intake cfm: 157 213 255 279 287 296 302. Exhaust cfm: 111 146 174 192 203 211 217 (no pipe). Fits Chevrolet 302DZ 305 327 350 383 400 427 434 stroker small blocks. These are casted over seas however the quality of these heads are very good. We have thoroughly checked these heads out and they hold very tight tolerances. You will not be disappointed. They are CNC ported by us in house and is our design. Just let us know what cam or valve springs are required for your application and we can quote you a price. NOTE : THESE ARE NOT PROCOMP HEADS. The item “Precision Race CNC Ported Aluminum Cylinder Heads Small Block Chevy Flow 300cfm” is in sale since Wednesday, June 10, 2020. This item is in the category “eBay Motors\Parts & Accessories\Car & Truck Parts\Engines & Components\Cylinder Heads & Parts”. The seller is “precisionautomachine” and is located in McMinnville, Tennessee. This item can be shipped worldwide.
- Manufacturer Part Number: S4400CNC
- Brand: Precision Race Engines
- Warranty: Yes