lol i doubt it was a d16y1, correct me if im wrong but arnt the SOHC vtec motors in an eg a d16y8?
back on topic exhaust has NOTHING to do it with, how agressive ur crossover relies on what intake ur useing, if u have a j's racing style intake (aka whales penis) your cross over to vtec will be alot if not definatly noticable
hope this helps
p.s i need pq points !!!!!!



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