Originally Posted by pbonsalb
You note that backpresure is highest close to the headers. What sort of power difference might be expected by putting 200 cpi high flow cats in the location of the stock primary cats with straight pipe in the location of the stock secondary cat, versus straight pipe in the location of the stock primary cats and 200 cpi high flow cats in the location of the stock secondary cats?
Sorry for insanely late reply!
You would not want to do this as it would definately keep alot of the back pressure unless the CAT's were huge.. then they would cause ground clearance issues.
The best and only way to do this is to delete primary and keep secondary high flow.
It is however a very very good question.