Well today I finally got around to getting my exhaust FINISHED. I ended up going with 4" dia x 22" long stainless steel slash cut tips turned to 45's on my truck. At first I wasn't too happy becuase it just made the tone deeper without much more noise then the turndowns, but now that I have driven it a few times to town and such I love it. It is nice and throaty while staying clean and deep. It doesn't have that whole wind blowing sound that my turndowns had. I will get pics later on but just wanted to say that 40 series originals with tips sounds so so clean.