Replaced the 3rd cat today with a 2 1/2" X-pipe.
Patrial throttle I get an annoying rasp. No rasp on normal driving or full throttle.
I had a slight rasp prior to the X-pipe install.
Is this due to the flexible coupling on the downpipes?
My setup:
3" non catted downpipes
2 1/2" X-pipe
Stock resonater
Stock mufflers
Meth
Modified intake
Tune