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Old 06-19-2018, 12:47 PM   #4595
mrg666
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Garage
Quote:
Originally Posted by max20s14 View Post
if you run the supplied tune with castles headers does that cause issues?
Catless header will probably cause CEL. You generally need special tune for an aftermarket header to take advantage of the performance benefits. I would stick with the stock header with JR carb tune which is an excellent tune anyway for the stock engine.
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