for turbo car i'm not sure..some of my friend just put 2.0 piping and 2.3 muffler,straight flow, manual..:rolleyes:
Hi bro, your ride is limited to 2" only, don't go more than that unless you modded your engine and increases around 20hp+ then u might need to increase the piping size. If 1.7", your pick up improves, FC improves and most suitable for daily driving. However, your 0-100 time attack will drop and full pedal has less responsive already.Hi Kweng84.I'm using civic 1.7.now using spiral type bullet and no midbox.piping all the way from bullet to twin loop muffler.piping size is 2".i want to change piping to 1.7".is it ok?also,from this informative thread, i learned midbox got 2 type,which is straight flow and s-flow,same concept like muffler.so,for my car,is it the s-flow more better,as it will do the back pressure.Thanks to all the sifu's