[d0gsg0w00f]

I believe that the increased heat level closer to the engine would alter the CC's performance characteristics.

[1] - https://www.open.edu/openlearn/science-maths-technology/scie...

[dotancohen]

Alter: Improve.

Catalytic converters must be hot to operate effectively.

[CarVac]

Improve the performance but reduce the lifespan.