I will be making my own straight pipe exhaust from the cat back. I am wondering what size straight pipe to buy. Does anyone know what the stock pipe size is for OD and ID? Any recommendations from people who have done this before?

Thanks.

 

well i wouldnt go for the stock size pipe id go at least 3 inches if not more dependin on ur upgrades

 

It doesn't make any sense to go with a bigger pipe if the flange opening coming off the cat is only sized for the stock pipe right?