There are so much headers out there. size, design. i have 00 gsr. and iam NOT plan to drop heavy mode on my engine. just light mode. later just get Cam shaft and cam gears. thats about it. so my question is what size of header=exhuat should i get? to get good flow and power out of it. 2.25ich? 2.38inch? 2.5inch? i know bigger pipe on light mode will have flow problem.

this info is from Team-integra.
-1/4" up to 210HP @ the flywheel (about 180-185 whp)

2-3/8" (60mm) up to 235HP @ the flywheel (about 200-207 whp)

2-1/2" up to 265HP @ the flywheel (about 225-235 whp)

2-3/4" up to 325HP @ the flywheel (about 275-285 whp)

3" big for big HP (Forced Induction: > 275 whp)

is this true?