Go for the 4.10s with the auto. The car is heavier and needs to get into it's power band quicker and is a higher revving engine (it's power is higher in the rpms) than the 5.0s. Rule of thumb for the 4.6 on gears for the daily driver is 3.73s for the 5-speed and 4.10s for the auto. K&N filter and remove the air silencer. Strut tower brace. Exhaust for sure. The exhaust on that car is very restrictive. with the 4.6 if you get an offroad exhaust h or x-pipe, you'll have trouble with the check engine light/emissions system turning on and cuttin' down the power unless you get MIL eliminators which will take care of that. but if you get a cat pipe (h or x) you shouldn't have any trouble with emissions. The new computer on the 4.6s (OBDII) is much faster and more sensitive than the 5.0s (EEC-IV). If you use X-pipe use straight flow thru mufflers (ex.:magnaflow), if h-pipe use baffled mufflers (ex:flowmaster). Underdrive pullies. Next would be heads and intake (FMS). Supercharger or turbo. Nothing cheap about the 4.6 upgrades.
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1996 Mustang GTS: 5-speed, K&N, removed air silencer, 3.73s, turndowns after stock H-pipe (no mufflers)
[This message has been edited by 96GTS (edited 08-30-2000).]
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