New Guy Here: Bolt on 4.6 Project. Please Help

hey guys. i heard alot of good stuff about this site so i came here for some advice. i have a 1999 Ford Mustang GT 4.6 2v Automatic.

My goal for this car was to get the best bang for the buck with a limited budget. Here are the mods so far...

BBK Cold Air Fenderwell Intake
Summit Underdrive Pullies
PP 70mm Throttle Body
PP Plenum
X-Pipe (Offroad)
Flowmaster Super 40 Mufflers
Diablo Sport Tuner
4.10 Gears

Where do I go from here? The car pulls amazing from 1-Drive then kinda dies out around 80mph from the 4.10's and lack of power.


I don't have money to build the engine or go with a supercharger unfortunately.

I have a set of Mac Long Tube Headers to be installed but local shop wants $350 to install them. I'm waiting to find someone to do it for less.

bigger injectors? lower intake manifold is out they're $700. should i invest the money for a cam? any other ideas? any help is much appreciated. like i said, i'm new at this so go easy. thanks again...

-Anthony M

hey guys. thanks for all the replies. that was helpful. i have a Sportline lowering kit from Eibach. not the smartest choice for traction but i have a body kit.

i would try the headers with some friends but i'm actually in a wheelchair. i got hurt last year racign motocross. so it's hard for me to do most of the work under my car and in the engine bay.

what's a trans cooler? never heard of that. the diablo sport has a shift pressure and shift point adjustable. would a shift kit still help? and do you have to pull the tranny? i drive the car everyday, it's the only one i have and i live in the city. so i'm not sure a stall converter would be a good idea.

would a different MAF sensor be a good idea?

the diablo sport lets me richen and lean the fuel out. my question is, would injectors help if i can adjust the mixture? or do they allow for a larger total air fuel mixture vs. a leaner/richer mixture?

last thing, lower intake manifold. i've heard they make great gains. the only person i found selling them in PP for $600. that's a bit out of my budget just for that part. any other companies that sell them?

thanks again, any help is much appreciated.