Quote:
Originally Posted by Abeo
HKS themselves say it's 409.
Just checked mine; tip and muffler body is 304, rest is 409.
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I couldn't find it on their website. You got a link? I think I posted here some spec sheet that said S3 (which I think is basically 409), but unlike other models, they did not differentiate between piping and muffler body.
It's good to have a decent option if this other one ends up scrapped.