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as above. Want to know what the difference in sound is with the different coloured inserts. Changed a Blitz ssbov for the hks and it doesn't sound that different.
Mine has the purple insert. Anyone know what it's like with the gold one?.
I was after a more high pitched whistling noise dump..ooeer
as you said with the circular purple insert in it sounds like most other dump valves, but with the triangular silver insert in it is a very high pitched screech! sounds much better like that imo.