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2012 Genesis coupe 3.8 track... so bolt ons I have a injen cold air intake, J2 headers, ark down pipes and test pipes, straight pipe back, ported throttle body and a throttle body spacer with a BTR canned tune. I was thinking about getting the 3point8 manifold riser but it says if I have a canned tune Ill need a custom tune in order to run the riser. Do I absolutely need a custom tune if I want to run the manifold riser? or can I just use it with my canned tune?
 

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I've been looking at this riser as well and am also curious. It says it would need to be retuned because, "This manifold riser extends the length of the intake runners which allows the air flow more time to reach optimal velocity-"
 

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Wouldn't you want to get the most out of it anyway? I would say the riser is more beneficial than keeping the canned tune, but if it worries you, wait and get retuned at the same time.
 

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