s14 exhaust?

[jdmkiller]

i plan on making big power, over 500whp. i want to know whats the biggest piping on a catback that you can buy. i dont want a stepped piping size. i want the same size piping from start to finish minus the tip.

[zenki4u01]

When do you plan on making that? I mean, if your not going to make that for another year or two, the largest diameter catback you can buy will not be a good choice. If you buy it too large without justification in mods, it will be useless and you will lose the back pressure needed.

now to answer your question. I believe i have seen some 4in piping exhaust. Largest I have seen.