I am looking to upgrade my current intake set up and wanted to know who has run a tunnel ram intake on the street. How did it perform on the street, what issues did you run into, any tuning hints and finally did you see any performance increase. I currently have a single plane offenhauser 360 dual quad set up with 1" spacers but looking at the runner design (sharp curve transition from plenum to the floor) I cant help but think there is some more to be found with a better intake. I am pretty commited to the dual quad set up and I hear that Edelbrock will be introducing their RPM air gap dual quad at SEMA this month but I have always dug the shear visual impact that a tunnel ram has. Any and all comments/help appreciated. The car is a 3600 pund 56 chevy with a 10.5-1 454, 4 speed and 4.10's and the carbs I have are holley 600 vac secondaries.