whats the difference between regular cats on magnaflow catted X and the magnaflow catted x with SPUN metal cats?
Are the catalytic converters stock from ford considered high flow or are they restrictive? Would I benefit in sound or performance by replacing them with high flow cats?(spun or non-spun)
Are the catalytic converters stock from ford considered high flow or are they restrictive? Would I benefit in sound or performance by replacing them with high flow cats?(spun or non-spun)