4150 to 4500 adapter
#11
Registered

Joined: Nov 2004
Posts: 14,100
Likes: 3,687
From: On A Dirt Floor
#12
#13
SB, The 4150 had 1.750" and the inside of the booster was 0.50"
1150's per Holley are 1.830"
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[ATTACH=CONFIG]555573[/ATTACH]
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.[ATTACH=CONFIG]555574[/ATTACH]
1150's per Holley are 1.830"
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[ATTACH=CONFIG]555573[/ATTACH]
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.[ATTACH=CONFIG]555574[/ATTACH]
Last edited by Rookie; 05-15-2016 at 03:16 PM.
#14
It's all good. Everything is open for discussion. And real information is always good information.
#15
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Joined: Feb 2009
Posts: 8,356
Likes: 1,515
From: NW Michigan
#16
When we swapped to the 4500 style intake we used that style spacer(not adapter). Picked up 5 hp going from no spacer to 1 in. Picked up another 5 hp peak going to 2 in., but not quite as much under the curve. Overall 1 in. was probably best. Will try another combo when they go back on.
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Straight bottoms and flat decks
Straight bottoms and flat decks




