Compression Ignition Addict
Join Date: Mar 2007
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My first 6.0, an '04, the first thing I did was cut the exaust off and install 4", aftermarket intake, and several other things I THOUGHT I needed to do. After all I was coming from a 7.3, it was well established those things needed to be done, right?
Fast forward to when I traded in the '04 to the current '07, me along with the rest of the world were much more informed with the workings of the 6.0. I think back and say why in the world did I cut off a stainless exaust system and replace it with aluminized pipe. Unless you're tuned hard and towing heavy the factory system is just fine. I have replaced the stock muffler with a Grand Rock straight through, and I think my kitty may have been poisoned or something, its guts exploded.
On the '04 going to 4" exaust I did notice more turbo lag, but no noticeable power differences. That truck was an "early '04", which means when the exaust is opened up the turbo effects on the ear were quite pleasant. I had a guy that worked for me at that time who lived on a busy two lane highway, when I would drop him off after work he almost would insist that I wait for a tractor trailer to be close before I pull out, that way they could hear me step on it, true story.