Summit says pacesetter has 3" collector diameter. did you reduce the pipe diameter from here? and if you did, where did you do it? before or after the cats? i want to get long tubes and hi-flow cats on my '02 5.4, but i am not sure of the best way to handle this situation. exhaust with 3" diameter all the way thru seems to me like it would be too much flow.

thanks for your input.:santa:

 

I have pacesetter long tubes with Magnaflow cats they fit right over the collector.