So u have an ITR (C5) motor or a C1? Or are u just calling it a type-r?

If you have an ITR motor, why would you need to buy headers? Didn't u get the ITR headers with the motor? If so, you don't need any aftermarket headers, as most companies just copy the ITR stock header and make it a bit larger, etc.

People rave about SMSP, but they are costly...

As for the test pipe, I don't think its helping you much, since you are N/A...

So what is it, B18C1 or C5?