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brand new 18 degree alum heads # is 18std, BRAND NEW but old version of 18x head have put used valves an springs an retainers in but never ever bolted on $1800 OBO OR TRADE FOR QUiCK CHANGE OR ? 230 cfm and 54cc chambers so u can hog to what u want NEED TO GO [PS] also comes with brand new [GM] alum intake