I've had my AFE intake for about 7 months now and I can definitely say that there's an improvement in fuel economy. I can't say that there's any noticeable performance gain but it certainly sounds nice. Accerleration off the line is noticebly smoother as Ekaz mentioned. Good mod for the money.

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Dinan S1 pkg / 22" Iforged Swift - Toyo 295F*315R / Eisenmann Race - OEM tips / H & R 15mm front
30mm rear spacers / Euro-spec headlights / CF M Competition steering wheel / Full CF interior /
6000K D2S / HID fogs / AiBrights V3 / Interior Xenon / LED sidemarkers / Matte black grille & hood vents