[Bobby330xi]

Too much back pressure can cause your exhaust valves to burn and it also makes the cylinder head run hotter. Granted, with the cats deleted and extra muffler deleted it would help with that issue. I agree that adding aftermarket mufflers might give you the sound you want with less drone. Magnaflow and Dynomax make good mufflers.

 

[Bobby330xi]

Right now I have aftermarket headers without cats and a muffler delete so theres verrrrrrrrryyyyy little backpressure.

I am referring to if you were to add more exhaust valve/flap assemblies. I know on my other motorcycle and VW engines, the exhaust makes a HUGE difference in head and valve temps. It can kill an engine in no time when plugged.