Here’s my contribution.
Current (V2) Specs:
- Stock primary cats
- OEM midpipe cut after secondary cats location
- Secondary cats are replaced with Magnaflow 14156 resonators
- Measured from downpipe connection, the US passenger side pipe is 14 inches longer than driver's side pipe before merging into 1 single 3.0 inch pipe
- Custom muffler from TopGear Motorworks. 3.0 inch inlet & outlet
- Outlet is 3.0 in -> 2 x 4.0 in dual walled rolled tips
V1 (previous version) - Sounds 2JZ down low, and S54 up high:
Exhaust design attached in photo. V2 shown. V1 is similar but with larger muffler with 4.0 inch exit and and 4.0 inch single walled tip.