I'm building a H22 for a friend and I told him to go k manifold on his h2b and someone else told me that xcessive speed has manifolds that bolt up to h22 heads now ... I have been doing research and haven't found any comparison between the 2

if anyone has any advice or input it would be greatly appreciated thankyou

 

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He did a dyno test and the excessive failed miserably. Their is no advantage of going with a k manifold vs. say a euro R h series unless you are looking at using the skunk2 ultra manifold

 

i thought the rbc manifold made more power then the euro r? atleast thats what i saw on prelude power