Ran on on my Dart with a Hemi and made more power than a stock X-ram.We have a customer with a 528" hemi and he loves it for the street driveability over his single 1050 set up.Another customers has gone mid nines at 3600# with a Hemi,my Dart has run 9.75 with 10.0 CR and 12" tires.Haven't tried on on a small block.The open plemum doesn't seem to hurt it,similar to a StageV intake.It works well with Edelbrock 750s and 800s on the Hemis.