Originally Posted by Thrashard340

Passing visual is only half the battle. The other half is beating tailpipe emissions. High flow heads may allow you to get more air/fuel mixture in, but it is also almost certainly going to increase exhaust emissions as well. Some of you guys are throwing suggestions out there that won't pass CA smog. But maybe the the OP should clarify to what degree of smog friendliness he wants his parts to be. CA is probably one of the top 3 toughest states to pass smog. In most areas, it requires dyno-load testing.