It truly is common that there's a limitation within the air flow sensor AFM/MAP over the 4B1 when masses a lot more air is getting fed into the engine. The engine also options an electronically controlled throttle, an isometric brief port aluminum intake manifold, as well as stainless-steel exhaust manifold https://4b12-intake-manifold34974.aboutyoublog.com/33625280/4b12-intake-manifold-things-to-know-before-you-buy