Hey, you don't want it to run so far back that the exhaust is too cooled down!
Must be before the main cat. I'd recommend the y-pipe where the two banks come together for the best measurement.
Former owner of '99 CSVT - Silver #222/2760
356/334 wHP/TQ at 10psi on pump gas!
See My Mods
'05 Volvo S40 Turbo 5 AWD with 6spd, Passion Red
'06 Mazda5 Touring, 5spd,MTX, Black
