I plan on getting an IS350 soon and I do want an exhaust system on it my question is which route if better. Buying an axel back from joe z or another manufacturer or going the custom route, by the way I can't stand any drone even the drone that happens when one of the back windows are open.

 

Maybe buy the IS350 first and see how you like the stock exhaust first? Seems premature to shop for aftermarket parts on a car you don't have yet.

 

I should of said I have a GS350 that had a muffler delete at one point.

 

if you want little to no drone, get the f sport or tenabe axle back. the quietest exhausts for this app. there are multiple discussions about this in the performance sub forum.