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Yeah, the ProCal tune is very limited. There are packages where they will 'tune ' it for extras, but you have to buy the package. Axle back or k&n drop in. Neither of which really need a tune
 

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ProCal should work with an after-cat X-pipe - if you go with a cat-delete x-pipe then you need a different tune.

I do not believe you need to tune to just swap from H-pipe to X-pipe if you're keeping the cats in place, but I could be wrong.
 

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ProCal should work with an after-cat X-pipe - if you go with a cat-delete x-pipe then you need a different tune.

I do not believe you need to tune to just swap from H-pipe to X-pipe if you're keeping the cats in place, but I could be wrong.
This is right I believe unless they are high flow cats.
 
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