So im always looking around for good deals on exhaust systems.. and i really like the HKS Hyper Catback system but its hard to find.. i find the Hi-Power Catback system all over the place... is this the same system?? also, does anyone know if Megan Racing is any good for exhaust systems? Im thinking about going with the HKS Hyper or the Greddy EVO II.. it seems those would sound the best and have the most flow capabilities. what do you all think?