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Evo GeneralDiscuss any generalized technical Evo related topics that may not fit into the other forums.
Please do not post tech and rumor threads here.
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My Evo has what I think is an Ebay exhaust. No cat.
If I were to make no changes other than to install an HKS TI exhaust, should I get a tune?
Originally Posted by ApacheToYaDome
yes^^
If it was already tuned for an aftermarket exhaust, I probably wouldn't bother. Take a look at your AFR's if you have a wideband to be sure, but I imagine there won't be much change.