70AARCuda
Nitro Member
well maybe here is the missing piece to the puzzle...
New Mopar Pro Stock Cylinder Head Debuting for Pro Stock competition in the National Hot Rod Association (NHRA), is a new symmetrical port design cylinder head. The bare aluminum cylinder head is available under part number P5155906. For teams running Dodge Avengers for 2012 in NHRA, either the current asymmetrical cylinder head or the new symmetrical will be permitted.
New Mopar Pro Stock Cylinder Head Debuting for Pro Stock competition in the National Hot Rod Association (NHRA), is a new symmetrical port design cylinder head. The bare aluminum cylinder head is available under part number P5155906. For teams running Dodge Avengers for 2012 in NHRA, either the current asymmetrical cylinder head or the new symmetrical will be permitted.