i see that the ws6store has a 3ID/3OD magnaflow muffler for an lm1 swap. i am about to install LTs and an ORY and the loudmouth is going to be too loud.
the ws6 stores is a 4" diameter. Will it be quieter if i get a 5 or 6" diameter one? i want it to be as loud if not quiter than the regular lm1 w/o lts and ory.

 

I think the 4" will be good enough but if you got a 5" or 6" I think it will be quieter. With LT's and ORY anything is pretty much going to be loud.

 

will a 5 or 6" fit?

 

Honestly I don't know but if you want to find out see how big around the borla XR1 bullet is.