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Re: head work shop
Probably not. The head needs to be throughly cleaned if you port it or deck it. And the 1mm over valves will need a valve job and need to be installed. You can put in 1mm over valves without doing any special porting. If you have stock pistons though, make sure the bigger valve aren't going to contact the pistons. Aftermarket pistons have larger/deeper valve reliefs.
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