Exhaust on this forum is very subjective as everyone likes something else. You will never actually feel the difference between the H Pipe/Y Pipe/X Pipe you would be talking about 5-10 whp-wtq at most. You would be better off choosing your exhaust based on what you think sounds good on your Z? I had the AAM 3” true dual exhaust set up before on my old Z and I really liked it. It fit like a glove and quality was excellent. Also my experience with the AAM customer service has always been great to each their own. Listen to some exhaust set ups on other people’s Z’s and listen to exhaust sound clips online that would be the best advice.
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