My Satria GTi has only minor upgrades ; mivec throttle body, adjustable cam pulleys + crank pulley, fuel regulator & apexi air-filter.
The cat converter has been removed.
Based on the minor modifications mentioned above, how many inches should my piping be?
From extractor to bullet to muffler?
Just got a 5zigen trumpet 2 inch inlet muffler, yet to fix it up.