Hi markag. I have the Airaid racer intake 4" no oil synthamax MXP series red filter no=AID-451-304 with a 94 custom tune. Throttle response is great and at lease 25 rwhp more and great sound.
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Bought New 05 Black GT coupe / TR-3650 / C&L Racer c.a.i / 94 custom race tune / Barton shifter / Exedy Mach 500 clutch / Ram billet steel flywheel / Ford racing stainless steel hard clutch line / 2014 GT500 forged aluminum clutch m.c/ Napa premium grade front l.c.a / Baer slotted cross-drilled front rotors / Roush pedal kit / AutoMeter Digital voltmeter / Compustar Pro 2 way Security system.