i just researched it and this is what i found Alright, so here is the main differences in a nutshell.... The 4-2-1 is less free flowing and basically better for torque and lower end power. The 4-1 is much more free flowing and better for higher end power. For all-around performance, I guess it will all depend on what your going for. I desired a more free flowing exhaust when I was building my engine so I choose the 4-1. Plus, with the supercharger on my car providing excellent low-end power, I wanted the more free flowing exhaust to increase the higher-end. As for the different kinds of coatings....it doesnt matter, the coatings dont affect the performance. The ceramic coat looks excellent under the hood. the stainless steel header also looks great under the hood and due to the constant heating and cooling, the header actually changes colors, it looks neat but I prefer the ceramic coat.
i'm sorrry if i confused anyone put all i did was copy and paste from another site. i don't have a SC
shit, would have been to good to be true. supercharger would be nice in combination with a turbo !! "stop day dreaming man"
