power pkg kits superchargers crate engines carbs access fuel pumps gaskets ... shocks qwikdata index ls1/ls2 348/409 chevy cylinder heads rpm xtreme for ls1/ls2 ... 1997 and later gen iii iv ls series engines including 4.8l 5.3l 5.7l and 6.0l ˇ ... chambers with port matched and blended intake/exhaust ports ˇ 212cc intake ports flow ... rpm ls semi-cnc heads for gen iii engines chamber size intake port size valve ... 65cc 212cc 2.02 1.57 n/a 61949 212cc intake ports flow 275 cfm conical progressive ... -port raw heads also available for this engine see pages 163-165 348/409 w series ... chevy street high-performance available bare ... -the-box performance performer rpm 348/409 chevy ˇ designed for 1961-1965 ... chevrolet w series 348/409 big-block engines ˇ original port locations and valve ...
power pkg kits superchargers crate engines carbs access fuel pumps gaskets ... qwikdata index flow data 28 h2o engine part number .100 intake/exhaust 65/52 ... cylinder heads .300 intake/exhaust 192/127 .200 intake/exhaust ... 130/96 .400 intake/exhaust 235/163 .500 intake/exhaust ... 258/182 .600 intake/exhaust 260/190 .700 intake/exhaust ... /188 note all flow numbers are in cfm intake flow numbers are long and short ports ... for b/b chevys right left ports for olds a flow ... 378-364/262 c flow numbers .800 402-409/284 .900 379-370/265 .900 409- ...