I too like to purchase the Nismo parts when they are available. However the nismo exhaust is not very aggressive sounding. More than the factory exhaust, but not near as loud as the stillen. However I added high flow cats (berk) and my nismo exhaust sounds great. I know a lot of people complain that HFCs & a stillen CBE are too loud. It ultimately cones down to what your looking for. Check out some videos on you tube before you buy.
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