WELL IN THE STATES THE A3 (160HP) SUCKS DUE TO NOT HAVING REAL VTEC BASACIALLY THE HEAD IS TO RESTRICTIVE BUT THE A2 (200HP) IS WERE IT IS AT BETTER FLOW AND JUST A BETTER MOTOR TO BUID UP ON AND A SHIT LOAD OF MORE POWER SIX SPEED TRANNY (A2) HIGHER COMPRESSION IF YOU WANNA GO ALL MOTOR THE A3 IS OK TO BOOST LOWER COMP BUT LIMITED DUE TO ITS DESEIGHN (MISSPELLED SORRY):thumbup: WISH YOU LUCK WITH YOUR BUILD UP, ENJOY AND ALSO WELCOME