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Originally Posted by Cruzz21
Does the 06 SI have forged internals?
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I doubt it, heck it doesn't even come with Fog lights why would they use forged internals in the Si? They are probably those Powder type Polymorphic kinda pistons that everyone is using these days. They are coated and have some benefits especially during cold starts when the engine is starved of oil,
however they don't hold up well under Boost and Nitrous can easily eat a hole right into the top of the piston.
If you go Nitrous your warranty is toast and you could ruin a perfectly great car. The R18 engine is more suited for Nitrous since it's a lot lower compression and it should work okay if you keep it to about 55 shot.
I was thinking Nitrous but with over 11.5 to 1 compression I don't know.