here is a dyno of it on a neonhttp://www.howellautomotive.com/phpbb2/viewtopic.php?t=757here is drag manifold for neonhttp://www.howellautomotive.com/Howell/Store/catalog/catalog/product_info.php?cPath=21_113_50&products_id=492howell even posted dyno #'s next to the product on their website, ppl for the neons are buying these like crazyindyheads info- im no intake manifold desinger but i bet they can answer ur questionshttp://www.indyheads.com/ 317-862-3724