I like them better than AFR for sure. Dart makes some nice stuff. The thing you need to realize, AFR has to CNC their heads to make them even work ok. These, bowl blended and port matched even, will make some pretty serious power. I guess, when you say, how do they compare, what do you mean? And, compare to what? I mean, they have some features, the others don;t. Like power vs power?
Frank
Advanced Performance
www.get-ap.com