I picked up the avid racing traction bar, no clearance problems now.
And i also have the RSR ExMag, i like it, vtec isnt very loud, which is nice. But you can still hear the crossover and especially hear it at redline.
Also i was thinking of getting the kamikaze header for a 99 civic si w/ 2.5" collector for clearance issues, 4-1 but one big down pipe (2.5") so there wouldnt be 4 runners going all the way to the flange, just one big one.