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...
guys...
mind sharing with me what brand of tyres are u using now...
its time to change mine... so seeking for some opinion...
i had TOYO, Advan Neova and Michelin in mind, but dont know which model to go with...