Had Greddy SP and it's broken in half! HAHAH! The SP sounded sweet though. Not a ricey high pitch backfiring tone. Right now I'm thinking about Apexi WS, similar to SP and cheaper as well. get it at, importrp.com for $418 shipped! Best price i've seen so far! Really want that SP again..SPII but the cost and after seeing what its capable of..ahah, maybe not.