^Check on it every now and then. Rev it every now and then XD
I honestly am not concerned because the gap is little.
@alphaqb: I got this idea from ddharon. Since he used 4 washers, I used 4 washers
, but you can experiment and see if 2 washers will sound any different. I would say that would be quieter since the gap will be smaller and the exhaust will flow through the muffler more.