Trying to run a little quieter.

My W9 is simply too loud with the supposedly quiet inserts in the middle spools. This is an 8" over the frame application with 52" stack tops. There is no room to install a resonator between the engine to the Y pipe. Whereas there isn't room to put a complete insert in the curved tops, do you think it would help to cut an insert 38" L in two an insert each half in the top stacks?

 

Thanks I tried another short baffle in the tops seems to be bearable now. lol

 

My 96 KW has an air leak thru the exhaust port on the firewall if you apply foot pedal. This is only when the park brakes are applied. Any suggestions?