Hi i am looking for an exhaust system for my 1990 300zxTT. I was looking at the monza exhaust on ebay and needed some info on it. My main concern is performance. Will the performance gains be similar to systems like greddy, HKS... Also need to know what sort of tone am I to expect? I did the search and all i found was alot of people bashing it (people who dont even have it) cuz its cheap so please dont do that. I just need to know if these are going to get me any performance gains. Also my other option is to just go straight pipe and weld some mufflers on them. Would that be better performance wise? Also i read somewhere in search that downpipe and testpipe sold on ebay for $200 are for 1 testpipe and one downpipe??? can someone confirm this. Also if you have either of the systems, your input will be valuable. Thank you for your time and sorry about making this so long.