cold air or mass air??

alright, so i have my 99 gt and im about to do some work to it..i ran into a little problem though that pissed me off...so originally i wanted the mac fenderwall cold air intake, which supposedly gives you 14.3 rear wheel horses..and now i just discovered the 85mm mass air kit which is supposed to give you 30 rear wheel horse!! thats crazy, but heres the annoying thing, the mass air kit is only for the 02-04 mustang gt's, why the hell not for the 99's??? is there any way to custom fabricate it to fit the 99 gt??


also, quick opinion..for an exhaust, i was going to put on an offroad x-pipe and run stainless steel pipes instead of my mufflers..i know that'll be a little louder, but is that better (more efficient for power) than getting mufflers? im also looking into getting some rockers but i cant find any other than from the dealer! any tips? thanks!

Going with straight pipes instead of mufflers is not a good idea. It sounds like crap most of the time and you loose back pressure. You will loose torque.

I have to argue with you on the sound. Then again I still have converters so it is a bit different then having none and I didn't loose any power, but again I left the converters on.

It is a bad idea to run true straight pipes I agree on that.

guys about the true straight exhaust would it be bad then to run long tube headers into off-road x into slp loud mouth exaust? thats a pretty straight though would i lose power if i did that sry for taking part of ur thread mate:(

i think we need to straighten you out on terminology... a mass air meter is a short piece of tube in your intake tract that monitors the amount of air entering the motor. it's in the middle of the black intake tube and has a wiring harness connected to it. by increasing it's size you remove a restriction. a cold air kit is basically a replacement for the black intake hose and the air box. most of them route the air filter into the fenderwell. the work basically the same way as the stock intake tube and air box, but are much less restrictive. a mass air 'kit' and a cold air kit are two entirely different things.

i think we need to straighten you out on terminology... a mass air meter is a short piece of tube in your intake tract that monitors the amount of air entering the motor. it's in the middle of the black intake tube and has a wiring harness connected to it. by increasing it's size you remove a restriction. a cold air kit is basically a replacement for the black intake hose and the air box. most of them route the air filter into the fenderwell. the work basically the same way as the stock intake tube and air box, but are much less restrictive. a mass air 'kit' and a cold air kit are two entirely different things.



no, i know what im talking about..i meant a mass air system..not a meter...heres a link to mac's regular fenderwall CAI http://www.macperformance.com/store/product1.cfm?SID=3&Product_ID=224 now here is a link to the 02-04 mustang gt 85 mm mass air system..this is supposed to be double the fenderwall... http://www.macperformance.com/store/product1.cfm?SID=3&Product_ID=768 and finally..heres a link to the cobra version..its a 95 mm..and it clearly states major hp gain.. http://www.macperformance.com/store/product1.cfm?SID=3&Product_ID=757 now what my question is..why cant the mass air system for the 02-04 gt fit the 99???

I wouldn't be so quick to believe advertised hp gains. JMO.

The advertised gains they list are in conjunction with other performance parts. Don't expect to see more the a couple HP from what you are adding to a stock motor.

The advertised gains they list are in conjunction with other performance parts. Don't expect to see more the a couple HP from what you are adding to a stock motor.


i'm fully aware of that, as i will be doing other mods..rockers, pulleys, full exhaust, 75mm TB, short throw, maybe gears..so at that level, i want to know which is more efficient...and why doesn that mass air deal fit the 99 GT!

get a CAI and then just buy a new, bigger MAF sensor. okay? you might pick up five horsepower.

First, never believe the horsepower increases that manufacturers claim. You might get half of that total. Second, if you want the most of a CAI, remember that a CAI in the fenderwell has a 90 degree turn before reaching the MAF sensor, therefore causing turbulence. I don't have a fenderwell set up, but just going on physics. One thing you could do is relocate the mass air sensor. Many of the fenderwell CAI's are made of steel or some type of metal, which absorbs heat and more heat = less power. I might be biased, but I have an FIPK which is a straight shot to the throttle body and made of hard plastic which does not absorb as much heat as metal. Many people are satisfied with the K&N.

alright, well im sort of confused with whats supposed to be where under the hood....what would be the ultimate setup? as of now, im aiming for the C&L 80mm intake with the C&L upper intake and plenum and a mac 75mm throttle body..is that good or is there anything better? thanks!

just take out the sliencer and call it a day...you will prob end up with the same HP gain as with a CAI

taking out the silencer and putting on a K&N is essentially the same as getting a CAI that places the filter element in the engine compartment, but re-locating the filter to the fenderwell will give you a bit more of an increase, especially on cold days. again, a bigger MAF also helps.

so what your saying is that its better to go with the K&N because it is cheaper and you dont have to do any mod to the car.

just take out the sliencer and call it a day...you will prob end up with the same HP gain as with a CAI
Exactly, a K&N panal filter with a removed silencer will do the same thing as any CAI will do.

I have to argue with you on the sound. Then again I still have converters so it is a bit different then having none and I didn't loose any power, but again I left the converters on.

It is a bad idea to run true straight pipes I agree on that.

Nice hood you have on that car

Yeah dude, as for the exhaust, get the off road X pipe and then FLow Master Super 40's mufflers. They sounds great and you cant beat their sound when your idling and romping on it :evillol: