a properly tuned length extractor does not compress the exhuast gas from 4 pipes into 1 pipe... the length of primary and secondary pipes are tuned so that the exhaust gas pulse can travel one by one into the pipes according to ur engine firing order...
What can I say, the Tokyo Auto Salon 2011 (TAS) was a great way to kick off the New Year, at least for me. Despite the struggles of tuners and automakers for the past years, the show continued as scheduled with the...