Doing a full cali to fed spec conversion

Fed Headers>Modified Equal Length Warp Y>Megan Resonated Test Pipe>2.5 Mandrel Catback>Muffler

Now on the megan test pipe I'm concerned on running into issues with volume, will I be okay if I stay with a 2.5 muffler? 3inch? Will I still need to add another resonator in for volume control?

 

That Q is impossible for anyone but you to answer.

What's OK to me may not be acceptable to you.