I will be purchasing a new exhaust for my truck soon. It's a 2002 f150 lariat screw. I am going to just use the stock exhaust pipe and just replace the muffler and put on a tip. I want a flowmaster 40 series delta flow. I'm pretty sure both the inlet and outlet pipes are 2.5". Correct? And do I need both an offset inlet pipe and offset outlet pipe? Thanks

 

Offset/center.

2.5" is correct.