megan racing stuff sucks for an IS300 and I would expect the same for a 370z I bought a set of megan headers and a Y pipe. The mold was horrible on the headers as they did not bolt up to the motor. Also they did not sit flush with the Y pipe either. I ended up having to get the stock header rethreaded and threw it back on. They wouldnt replace or refund...Very disapointed. Will never buy from them again.