Headers

[Avlany]

I wanted to ask if you guys know how much would it be to instal Headers on 325i '95 ? as well as was wondering guys for your oppinion about those.
http://cgi.ebay.com/ebaymotors/ws/eBayISAP...&category=33631
Thanks in advance.

[frank de jonge]

These won't work and almost give no HP.

There is no good flow.

[jshearer]

http://www.turnermotorsport.com/html/show_...exhaust#Headers

If you want headers go for something from a reputable company. I think price to performance ratio is too high and your money is best spent on something else.

[jllphan]

Also keep in mind, that headers aren't where you start. If you've already added numerous other mods first, then fine, but if your car is otherwise stock, your only hurting yourself by adding headers.

[Avlany]

Thank you for reply guys, I understand. Can i ask for a small pointer? What is the sequence of mods you sugest? Like #1, #2, #3 .....My car has a few mods but nothinf serious, few parts are on the way atm.

Thank you in advance.

[97alpineM3]

Well.. a lot of people go with brake, suspension, interior, engine including exhaust.

Les

[94BMW325i]

Doesn't that ebay site give you 2 headers? I thought inline engines only had one header?

Intake, Exhaust, Brakes, Suspension

[jllphan]

Bolt-on's first, then if your not satisfied, move to internals.

1. Tune-up (new plugs, fuel filter, possibly O2 sensor if you have 100Kmiles)
2. CAI
3. Free Flow Exhaust
4. MAF (off a 540i)
5. chip (although if you move to internals, you will need new software)

7. underdrive pulleys (not an internal mod, but I am a bit skiddish about this)
8. cams
9. injectors (hi-flow 24lb,)
10.headers

But Alpine offers good advice, you can greatly raise the level of performance of your car with suspension and brake mods. Couple that with a few bolt-ons and you will have the ultimate driving machine.

[Avlany]

Ohh, sweet. Thx for the list guys. I guess I gonna have to hold on headers if ill ever gonna need them
Several mods has been done on a car by first owner. It has M3 full body kit (OEM), some sort of race brakes with vented rotors, 17" wheels with BFGoodrich Ge-Force and i am not sure yet what else he did. Myself, i changed all spark plugs to BOSH Platinum +4 (will switch it to +2 soon), spark plugs booth (original BMW). Soon ill put new CIA (its on the way, a good one ), aluminium short-shifter. Curently i am shopping for front/tail lights, side/fender mark lights, new rims (i guess for 17" tires, i cant afford everything at once), front/rear brake kits (rotor/pads), suspension kit (like bilstein sport), strut bars, sway bars (with kit), carbon fiber hood (which is pisses me off with all those scams around and abnormal prices) and some more interrior/exterrior stuff (like knobs, sits, sound etc).

I know, I probably asking too much but can you guys plz check my list is anything else i am missing and what i am looking at (money wise).

Thx for the help everyone.

[B_w.]

1. good tires
2. springs and shocks or coilovers (make sure to replace any worn suspension parts like bushings etc. at the same time)
3. x brace
4. sway bars
5. lsd
6. exhaust
7. CAI
8. crank pulley (some people do not reccomend these) or a crank pulley
9. m50 intake manifold (off a 325)
10. s52 m3 cams with new software
11. ssk
12. ltw flywheel (not if you get a crank pulley)

make sure your car is well tuned otherwise you are not going to see all the potential gains from your mods.

a carbon fiber hood is only going to be for looks. it will not give you any performance gain and might even look bad depending on the color of your car.

540 MAF - there is debate as to whether or not this is a good mod for the m52. some say that the m52 does not have enough enough power to handle the extra airflow. plsu no companies that i know of make software for this. it would require custom software which is $$$$$$ JILPHAN what kind of gains have you experienced with the 540 MAF?

the stock headers are already pretty good. unless you decide to go FI there will be no need to increase the flow.

to do most of these mods you are looking at some serious $$$$$$

[jllphan]

Everyone has their own opinions, but personally, I wouldn't mod the crank pulley. At the very most, I would only underdrive the accessories like the alternator...leave the crank alone. Just my $.02

As for CF, it is microscopic, but it does offer significant weight savings. I'm plannin on adding CF hood and trunk, as I stand to save nearly 100lbs by doing so. Coupled with other weight reduction mods, this will add up, and make the car quicker.

As for the 540MAF, doesn't make much difference. I can't tell you the differenc in ponies with and without, because I had custom software built by Active Autowerke to go along with the addition of the MAF and a CAI. When dynoed, it didn't show a big gain, just a more linear curve.

The reason I added it, was because it keeps one from bottlenecking the flow of air. I have a 3.5" CAI, and the stock MAF steps down to 3". This way I maintain consistent air flow all the way up to the throttle body, which I'm contemplating changing, and deleting the ASC alltogether.

[Avlany]

Thank you for replys guys (I know how hard is it to get some time to answer noobish questions in our busy life), I truly appreciate it.

I have M50 engine in my car it seems. But screw this, Ill make a pics in 1 hour or so and ill post it here. It would be super if you folks can take a look at it and see whats up.

Thank you in advance as usual.

[B_w.]

when reducing the weight of the car you must be careful to maintain the proper weight distribution. lighter weight will help 1/4 mile times but could throw off the handling if it is not properly balanced.

[jshearer]

If it is a 1995 325 then yes you have a M50 so would not need to worry about that. It all really depends on what type of mods you want handling performance?, speed and quickness?, appearance?

[Avlany]

I mostly aim for 1/4 mile. Trying to do as much as i can to boost my performance and maintain a "cool factor" which i am not giving up for anything .I will remove/exchange some parts to save some waight (like my beloved electric leather front sits etc ) but i am not going to empty my salon to "stearing wheel+shifter+sport sit+nothing else" stage . Along with all this i still going to try to maintain handling with new springs, struts and frames/bars.