Hey guys was planning on purchasing this exhaust. What Test Pipe do you recommend. Not sure between 60mm or 63.5 or something else? I am pretty sure the exhasut piping on the Tanabe is 60mm?

 

60mm would be the best choice but I doubt you would notice much difference with 63.5mm.

 

Whatever the diameter of the exhaust is I would get that diameter test pipe.

 

Is the flash pro needed after a test pipe and exhaust? I wanted to get it but a later time. Will I be ok without it I the meantime?

 

Give it a test and see.
Mine ran weak before secondary cam, yes had flat spots. 2.0L / 9k rpm
I made a 44mm and installed<in the 50mm area> restriction plate in RH side to give a little restriction,+ increased torque , it worked well pulling to 9k with no flat spots.
Tried a few options to lessen noise .have installed a 25mm extensions in the muffler. Tanabe Concept G.

 

Ok thank you. 1 more question. The piping for the Tanabe is 60mm and I only see Berk TP in 63.5. Will it fit ok?

 

Have a 63.5 Berk HFC on mine and is fine.

 

Yes, it will fit fine.