dieselenthusiast· Premium Member
I have the 4040XL and let me tell you, it was loud with the cat off. I drove it for a week and put the cat back on.
how loud comparing to a straight pipe?
Keep us posted. I want to know what you think. The 4040 does sound very nice, and if you want loud, then take the cat off and you will hear loud. :thumbsup:Thanks, Im going to try to get it installed before the end of the week