Title: These heads are an open chamber design. Not like the 67 heads that are of a closed chamber design. Now in your case this is to your benefit. More open area equals less compression. Not much but every little bit helps.
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These heads are an open chamber design. Not like the 67 heads that are of a closed chamber design. Now in your case this is to your benefit. More open area equals less compression. Not much but every little bit helps.
