I"m not sure what to get...I AM sure that it will be stainless steel, not ceramic coated shit for my car! A'pexi says it matches the 4-1 performance-wise, without sacrifing any poer throughout the RPM band, but it's damn near close to 500.00. GReddy is the cheapest at 351.00, I know I can trust the GREddy name. (EVO 0wnz!) As for DC, everyone has them, and Brian rants on and on about how they break, even though I've never seen it. I'm leaning towards A'pexi, followed by GReddy, and then DC Sports.