Originally Posted by Ant830

the single is deff. cheaper but doesn't have the hp capability of the TT unless you go with a larger turbo but then you lose low end tq. because it takes longer for the turbo to spool.....unless you spraying before full boost...but for the most part....TT = faster spool up = more tq. down low and more hp out of the stock turbo's. But the aps or turbonetics put down more power than my greddy at stock boost. There's a lot more to it but that's the basics.