3" exhaust reducing down to 2 1/2" after x-pipe

S USED TO WAS BACK.

toolmanmike said

Necking down a size has been done forever on Automotive exhaust. Some say it keeps the velocity up after the restriction.

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Ty removing the tail pipes and then tell me what u think. U will be able to tell the diff., unless ur car doesn`t make much power to star with.