i have edelbrock d ports and edelbrock round ports. although i think d port header avail is better still you can get round port headers for alot of cars now. i kinda bastard child my edelbrock dports just because i never liked trying to install 64/7 gto headers on d port heads. for whatever reason, i can install round port headers awhole lot easier. its hard to believe that 330cfm can be got out of the dports but butler has a program for it same as round ports, although round ports can go further,
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