Headers are from Electrodyne, they had a black Friday sale that came in handy (35% off), midpipe catless headers are from Circuit Werks (non resonator version).

For the intake I have a 987 Cayman S airbox, custom intake piping and a 996 mechanical throttle body. Nothing on the intake side was changed between dynos.

Most of the A/F is 11.75-11.5, the only time it's near 11 is at 6K rpms. In contrast, my SPB (2.5L stock intake system and exhaust headers) runs from 11-10.5 throughout the RMP range.