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Up for sale is a Honda b18 manifold on a NB flange. This was welded up by Chatham CNC.
Includes custom plate that allows for a miata throttle cable bracket along with a throttle body adapter ported to run a skunk2 64mm TB. It’s removable so if you want to run a larger Honda TB you can. There is a plate welded on to utilize the factory miata intake manifold brace, which prevents cracking at the flange. The brace and hardware are included.
I picked up a few peak HP over a squaretop using this manifold on my N/A BP, but forced induction is where this manifold will shine.
$425 shipped CONUS
Going K swap so I am slowly purging my go fast BP goodies.
That's pretty cool! Are there any before/after dyno results comparing a stock or squaretop manifold to this one?
Sure thing here’s a comparison between Honda and squaretop N/A. It’s not apples to apples, I swapped intake cams too and looking back I’m thinking it’s possible the intake cam was a tooth off for the dyno. Or the new intake cam simply pushed all the power to the right.
There are a few instances in an FI application where a manifold like this clearly outperformed a squaretop. It may work well in a wilder N/A application too.
12-18-2019, 04:39 PM
Honda intake manifold for NB head $425 OBO
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