sstang

Which mod would give more power?:
1. UDP's
2. O/R X-pipe
3. plenum + 75 mm TB

My only mod right now is an air intake...

hotrod7687

Any one you choose will give you about the same increase. Probably about 7-10hp increase.

I would consider a set of gears, they wont give you any more power, but it will really help your low end acceleration. Also might want to look into a tuner.

wwmost

WhiteFaleen2001

option number 3 id say, and go accufab.
but, if you go options 1 and 2, it will cost about the same, if not less

xxkazp3rxx

Actually out of all of those...

75mm tb/plenum = UDP in power

Xpipe is the LEAST powerfull.

A good TB/Plenum will net you 6-10rwhp, udp will free up around 6-8 (for some reason - more in some cars? with the smae setups)
o/r xpipe... maybe 5

My advice.. save up for gears and a tune. Then do everything else - Gears don't add power but change how it's applied. Gears + tune should be your first mod for any mustang GT.

racer02GTstang

if you decide on the o/r x.. i would suggest a catback too.. the offroad X isnt gonna give much till those restrictive mufflers are off.

sweet99

I didn't get much with the UDP's or the TB/plenum. Gears yes. Even a set of new NGK platinums gave me more that the UDP's and TB. A steeda timing adjuster will do much of what a tuner will except adjust for gears and firm shifts. Best bang and most overlooked in my opinion.
Don't look for big gains for all of the bolt on mods. I did all except headers and my car got about .5 quicker and 5mph quicker. Not a good return on $2K+.