Pypes 2.5” X system with Race Pro mufflers
 

I installed the Pypes 2.5” stainless X pipe system this weekend on my pretty stock 72 GTO with the original 400. I installed it with the Pypes tailpipes which are incorrect for my year but wanted to have everything lined up correctly so I can remove the Pypes tailpipes & get a new set of 2.5” stainless tailpipes done that will use the factory splitters. No road test yet due to the weather but sounds pretty good at idle in the driveway.

https://youtu.be/suzb4MOjsTw?feature=shared