Once you delete your catalytic converters and run straight test pipes you will get the raw unburnt fuel rich smell and a raspy exhaust note it is normal. I hear more times than not people hearing rattles,ticking,etc. noises after a aftermarket exhaust is installed it is not normal. I would choose a different shop to get your exhaust installed at and try again and reinstall everything when you get your exhaust installed. You could also have different test pipes installed.
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