WHy Do Aftermarket parts Cause problems
Ever wonder why so many after market products cause problems?
Ford engineers and intergrates entire system ( if they don't design a system the certainlyspec. it out). Ford has lots of engineers with access to super computers.
K and N
Accel, et al
have a few engineer with laptops and desktop computers.
Who is likely to design more reliable and functional parts. The factory parts are also required to meet EPA, FMVSS, etc. requirements.