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My only regret is that I didn't do it sooner. Love the sound and power that they added. One of the best mods you can do. I have stainless power LT's with no cats going thru NPP and it sounds awesome. I DD my car as well.
Safe to bolt on and go, but best to tune it at the same time to avoid the annoying check engine light and you will also pick up a few more HP. (Tuning will sacrifice the warranty however)
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