I have andy f's old intake on my car. inline two fours with two 750 edelbrocks.I have been in the nine eighty's at 136 mph. with a 55 over rb near 14-1 compression,ported -1 heads and a 715-715 roller cam.I have yet to mess with the tune up yet. it has a slight stumble at the hit. the sixty foot numbers seem a little off for the et's also. its been crappy here and have not been back out to mess with the tune up. all in all I'm pretty happy with the intake.