first of all, what is the difference between a streetable header and a road race header? and what would i need to connect the cat back to the header? would either of them attatch directly to the cat back (same as apex n1 that has the presilencer)? keep in mind i dont have any emmisions laws where i live.

 

A 'road race' header has two outlets at the flange, one for each rotor. A 'streetable' header is already collected at its outlet flange.

To connect a road race header to a catback, you need a custom collector to merge the two paths into one. To connect a streetable header to a catback, you need either just a custom pipe to connect the two, or buy a presilencer to quiet it down a little bit.

 

the cat back has a presilencer on it though. which one would give me more power?

 

anyone know?

 

i have a bond pipe type thing, i dont know how big it actually is though. answer this:
Does the apex n1 cat back take place of the mufflers and y pipe? is that its equivilant?
would a 18" or so bond pipe fit inbetween with a little welding?

i dont know what this bond pipe thing is exactly, the shop put it in replacing the cats. they called it a "bond's downpipe" but its about 18" maybe, and i just need somthing to connect the headers to the cat back.

 

obviously anything that quiets it down will cause a slight loss of power due to backpressure (in a turbo model) but in an N/A you need a little bit of backpressure to open those aux ports and keep the engine happy.

 

there are no aux ports.........anymore, they're gone
so im not worried about that, but what would be the best solution for everything. i just dont know what all i need.