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      07-08-2020, 11:39 AM   #2
W37V
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Drives: e92n52 & f15n57
Join Date: Aug 2014
Location: DMV

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Depends. You might never reach n52 numbers. However, how much are willing to spend chasing maximum gains?

Your options that shouldn’t affect the emissions are:
Tune, air box mod (Euro airbox with dinan mod), silencer delete (rev motoring hose), milvs. If you decide to do milvs, you need to get stage fp tune. Otherwise AA is perfectly adequate and comparable. That should yeild up to 20whp increase (if not more). You could also replace your muffler. That should free up some hp as well.
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