I was wondering if any Lightning racers noticed a performance improvement changing the muffler on there trucks?Not headers just muffler and tail pipes.
The reason I ask is I scored a complete 2000L exhaust system and I wonder if the muffler is any good performance wise.I have a 2000HD with a 5.4.The stock setup on my truck is a 2 into 1 into the muffler then 2 out.The Lightning is 2 into the muffler 2 out as I'm sure you all know. I'm more into a performance increase than sound.
Thanks for the help.