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Why?
Are you having problems with the OEM stuff?
I've never had problems with the OEM stuff unless you:
1) Overheat the engine
2) Detonate the engine
What kind of power are you making?
Soft seals have been reliable in 400...500hp engines.
How much more power do you need???
I don't think used housing can handle higher levels of power / boost.
This almost requires BRAND NEW HOUSINGS (for tighter tolerance and less wear).
Last time I heard someone developing aftermarket seals, get in touch with banzaitoyota (I think) from the other forum - his made-from-the-same-stuff-they-use-in-nuclear-reactors came out to somewhere north of $1,000 PER SET.
-Ted
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