5.0 mustang build up where to start
 

would like some info on good bang for the buck addon's ,it's a 93 lx 5.0 with K&N filter ,3.73 gears, just put in an off road x pipe stock headers,was looking at an pro-m maf 77 and larger tb 65 or 70mm?can get gt40p heads for 412 each canadian dough, intake not sure of? cobra or trick flow street the cobra is old stuff hoping trick flow is better and it is cheaper too,ican swap my old 86 5.0 headers unequal set or should i go for an new equal set? i was saving a chip for last, brand? can i still make good power with the stock heads? thanks for any help this is a great forum for me it helps an old newbee

The MAF and TB will be a nice addition for the intake side...not sure what sizes you should go for though... I'd probably get the 70mm throttle body. Heads will make a big difference, but they are pretty expensive. The stock heads will allow for a decent amount of power...but a board member on here told me he saw pretty good numbers running the stock heads, but heavily ported and polished....that's up to you what you want to do. I don't know how good the GT40p heads are....what are the valve sizes on those? Ideally you want 1.9/1.6, or 1.94/1.6 valves. My Performer RPMs work very well but at $1100 american for a pair..they aren't cheap. I've got a Cobra intake and it works pretty good but I'm sure the Trick Flow one is better. Like you said, the Cobra is old. Headers....all I can say is I'm prejudiced against shorties...unequals are much easier to work with. The equals might make more power, not sure..but they EAT spark plug wires for breakfast..if you go equal-length, invest in some boot protectors! I'd go with longtube headers though..they really are the best....and they'll sound good with a new set of heads. Heads tend to make shortie headers sound like crap...my exhaust sounds horrible now solely because of my equal-length shorty headers.

think valve size is 1.84in 1.48 exhaust

to anwer your question, yes you can go pretty fast with stock headers, i went 13.5 @ 100, but that isnt fast to me anymore:)
I always recomend subframe conectors to be installed on a stang as one of the first mods imo...

13.5 at only 100?? Man, you hooked that thing up!!