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N20 320xi Catted downpipe w/ stock exhaust
Anybody on here running a catted downpipe on their N20 with stock exhaust? been doing some research on catted and catless downpipes. definitely want to go with catted so i can still be road legal. doesnt look like a huge difference in gains between catted and catless. i am just curious as to how your power gains are, and if it's ok to run with a stock exhaust. thanks in advance. also running a stage 1 BMS tuner and an injen intake if that helps.
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