agreedI don’t think there is much science behind this part. It’s just a tube and the sound produced would be largely the same.
As long as the diameter is the same I think the only difference would be in material used and build quality.
Maybe a slight difference in volume depending on wall thickness? Even then, wouldn’t be much.
None at all in several months.Anyone with a 3rd cat delete tell me what/if warning lights were thrown up?
I've got a back box mod and the valves fully open and wonder if cat delete would be too much 🤔None at all in several months.
For anyone considering a full sports exhaust I would suggest trying a simple and relatively cheap decat with the standard silencer first. It makes a big difference to the sound and personally I certainly wouldn't want it any louder.
There is no OPF, there is a primary catalytic converter located on each bank of the V6 coming off of the headers. Finally there is a secondary catalytic converter with no upstream or downstream oxygen sensors that Emira / Evora owners often call the "3rd cat".Does anybody knows we’re the OPF is located? Is it located on/at the 3rd cat? What does the 3rd cat finally do?
Thank you😊There is no OPF, there is a primary catalytic converter located on each bank of the V6 coming off of the headers. Finally there is a secondary catalytic converter with no upstream or downstream oxygen sensors that Emira / Evora owners often call the "3rd cat".
View attachment 33570
2x Red = Primary Cats
1x Green = Third Cat
Blue is the downpipe which combines both bank's exhaust flow together and merges to a resonator and then to a single pipe that feeds into the 3rd cat. You can slightly see some of the sensors in this photo as well, there should be 4 oxygen sensors total, 2 in each primary cat, 2 after each primary cat.
Finally to address what the third cat does -- it reduces emissions -- something this aging drivetrain has trouble with.