I'm going to run 2.25" all the way, reuse the stock muffler, and may or may not omit the second cat. depending on how this sounds.
2nd Gen. header trimmed, 1.75" to (right side 2" for near 90 degree bend to collector) 3" collector eventually to 2.25" with omitted cat.

1.75" to (right side 2" for near 90 degree bend to collector) 3" collector eventually to 2.25" with omitted cat.
The 1.75" coming from the head's are equal length once meeting the collector and meet dead center under the transmission.
This is just the mock up,more pipe to be cut and welding. This will bolt up to the second cat's. flange for easy swapping.
