A catback can maybe give 3-5whp, but its hard to say. Yes, overall, you will probably have more of an increase in any type of performance or prevention of heatsoak with the S3 IC.
The S3 IC is the same type as the stock IC just thicker and all aluminum construction.It looks like the S3 is a front mount IC whereas the OE IC is on the bottom. Is this correct? And if so, how does the S3 affect the use/operation of the OE?
The S3 IC is the same type as the stock IC just thicker and all aluminum construction.
One major thing you are forgetting to put on your list is installation cost.