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I have been going back and forth with a tuner about a long tube x-pipe package for my C5. He suggested a Speed Engineering set, but they don't have any with cats installed. I would like to have some sort of cat in the system to keep the smell down and wife happy. My two thoughts now are either getting the 3" weld on cats from speed engineering or these "non-epa" compliant cats from GESI: https://www.gsportbygesi.com/g-sport...stems-products
I don't really want to spend $400 per cat for the kooks green can (also made by GESI) nor do I want to spend $2500 or $3000 on a "name brand" set with cats. These GESI sports might be the ticket to keep both the smell and price down. Thoughts?
Last edited by Bigmik1021; Jun 10, 2025 at 10:21 PM.
I do not have cats. 408 with 1000cc injectors and supercharger. She's been tuned properly by Jeremy at Fasterproms. No fumes. I would not pay more than a couple hundred for both.