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Old 04-24-2019, 10:47 AM
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Originally Posted by 55 Tony View Post
Don't know if I'll end up with a 4 hole spacer or an open one.
Dual-plane manifold, use a 4-hole spacer. Single-plane manifold, use an open spacer, but don't be surprised if someone from Burnt Stump, Arkansas chimes in and tells us that he made more power with a dual-plane intake using an open spacer. Spacers are not an exact science.
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