Hi as the title says is there an NSX exhaust to replace OEM, no louder but half the weight (OEM is ~20kg, so 10kg would be good). Im not interested in the exhuast sound being different to OEM as all the exhausts Ive heard are too loud and do not sound good. So is there a replacement that is not louder (or as close to not being louder) but saves some weight and is maybe a bit more free flowing (though I don't know if that is actually an issue on the OEM exhaust or if the OEM cats would be the thing to replace for that)

Many thanks! I cant find one!
Chris