I ordered a bad mab header for my lsj and as far as I know I will need a tune but I know nothing about tuning.This is if I install it with my stock exhaust. I have the stock downpipe on my car and the stock catback exhaust.

 

I dont think you need a tune to run the bad mab header. But it will not gain much without a tune.

 

you wont need one

 

Tune it or it will explode and catch on fire

 

 

Thank you guys

 

ACTUALLY You would not need a tune to run of course ( BUT TO GET WHAT YOU PAID FOR ) Yes!!! Reasoning is youve changed the way it runs so therefore changing the flow of exaust flow and how the engine kicks the flow out!