Currently,my gti is in all ori condition,which means 1 catalytic,2 center box (first one big,second one small),then to the twin tail pipe muffler.
so i m planning to remove the catalytic(then replace by one silencer) n the 2 center box,wat diameter should i use for piping,some say 2 inch good but more fuel consumption,some say 1.75 inch good n less fuel,i really blur.N also wats the piping size is normally use in track?
If i wan to change the muffler,is the oval type better or the N-1 type better.
MILLION APPRECIATE OF UR ADVICE.
so i m planning to remove the catalytic(then replace by one silencer) n the 2 center box,wat diameter should i use for piping,some say 2 inch good but more fuel consumption,some say 1.75 inch good n less fuel,i really blur.N also wats the piping size is normally use in track?
If i wan to change the muffler,is the oval type better or the N-1 type better.
MILLION APPRECIATE OF UR ADVICE.