3 0 ▁P 4 , ▁a ▁V 1 2 - eng ined ▁end urance ▁car ▁intended ▁to ▁replace ▁the ▁previous ▁year ' s ▁ 3 3 0 ▁P 3 . ▁Only ▁four ▁Ferr ari ▁P 4 - eng ined ▁cars ▁were ▁ever ▁made : ▁three ▁new ▁ 3 3 0 ▁P 4 s ▁and ▁one ▁ex ▁P 3 ▁ch ass is ▁( 0 8 4 6 ). ▁Their ▁three - val ve ▁cyl inder ▁head ▁was ▁mode led ▁after ▁those ▁of ▁Italian ▁Grand ▁Prix - win ning ▁Formula ▁One ▁cars . ▁To ▁this ▁was ▁added ▁the ▁same ▁fuel ▁injection ▁system ▁from ▁the ▁P 3 ▁for ▁an ▁output ▁of ▁up ▁to ▁ 4 5 0   hp ▁( 3 3 5   k W ). ▁ ▁The ▁P 3 ▁won ▁the ▁ 1 0 0 0 ▁km ▁Mon za ▁in ▁ 1 9 6 6 , ▁and ▁the ▁P 4 ▁won ▁the ▁same ▁race ▁in ▁ 1 9 6 7 . ▁Two ▁P 4 s , ▁and ▁one ▁ 4 1 2 ▁P ▁crossed ▁the ▁finish ▁line ▁together ▁( in ▁first ▁ 0 8 4 6 , ▁second ▁ 0 8 5 6 , ▁and ▁third ▁place ▁ 0 8 4 4 ) ▁in ▁the ▁ 1 9 6 7 ▁ 2 4 ▁H ours ▁of ▁Day ton a , ▁for ▁a ▁photo ▁finish ▁to ▁counter ▁Ford ' s ▁photo ▁of ▁the ▁Ford ▁GT 4 0 ▁M k . II ▁crossing ▁the ▁finish ▁line ▁together ▁First , ▁Second , ▁and ▁Third ▁at ▁the ▁