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...
I came across this website by accident when searching for some seats and remembered a post on the australian forums about the malay MR2 scene so thought I would join up. My experience with Malaysia is...