6ports blow, the ports are so dam small even with a big streetport it barely flows more then a stock port 4port (4port is a 13bt). Not to mention the N/A manifolds suck as much as they possibly could. Rip apart that 6port, take the 9.4 rotors and stick them in a 13bt. Streetport + 9.4 + BNR stage2 = fast ass daily driver.