who has 5sfe w ebay header Options

[eldrewado]

hello all. i saw on another topic that a member reported that with the ebay header his mileage went down. has anyone else found this to be true?
has anyone kept the stock manifold but changed the rest? if so what did that do for fuel economy/performance? any input greatly appreciated, thanks.

[BlueST205]

uhmm.. On the contrary most bolt on mods will INCREASE MPG. when replacing your cat and stock muffed intake you are freeing up vacuum pressure
allowing the engine to use less power to breath. Therefore using less fuel to create the same power. Our engines are running 20-30% rich, because of this factor we can add most bolt on without fuel adjustments, cause as we all know a lean engine is a dead engine.

BlueST205

[Special_Edy]

uhmm.. On the contrary most bolt on mods will INCREASE MPG. when replacing your cat and stock muffed intake you are freeing up vacuum pressure
allowing the engine to use less power to breath. Therefore using less fuel to create the same power. Our engines are running 20-30% rich, because of this factor we can add most bolt on without fuel adjustments, cause as we all know a lean engine is a dead engine.

BlueST205

+1

However with our 7afe and 5sfe the stock intake and exhaust manifolds are adequate. It varies from engine to engine and between manufacturers, but the single most restrictive components on our engines, the ones that will give you the greatest performance boost, are the cylinderheads and camshafts.