Originally Posted by pbonsalb
Do you have any dynos that show the secondary cats pose no restriction? I agree on the bang for the buck part, but not on the perform virtually the same part. While a pair of 400 cell cats plus a pair of 200 cell secondary cats are a greater restriction than just a pair of 200 cell cats, a pair of 200 cell secondary cats is still a restriction.
On an NA application, secondary cats vs Akrapovic Evo vs catless, I had a total horsepower variance of less than 9 horsepower. I'm happy to give up 2% power to not stink as badly.