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Go Back   E46Fanatics > Tuning & Tech > Driveline, Engine & DME Tuning

Driveline, Engine & DME Tuning
Talk about driveline improvements, NA tuning and DME tuning your E46 BMW here. This includes diffs, intakes, exhausts, chips, software and OBD tuning.

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Old 09-25-2009, 09:28 PM   #1
bigseth2468
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Technik Headers and Header Install Kit Part #'s

I received my Technik Headers today! I had thought seriously about going with some Ebay headers, but ended up with these instead... I can't wait to get them on the car! I am planning on just installing the headers for now, leaving the stock exhaust, and stock intake. I have a few quick questions. Should I anticipate any problems other than the regular check engine light (I know how to take care of that) after the install? How important is if for me to have these ceramic coated or heat wrapped? The DME should adjust itself to the motors new ability to breath without software correct?

I have also looked up what I think are the part numbers for all of the gaskets, bolts, etc that are commonly needed for this install. I have done a ton of searching and had not seen all of this information together in one place (except for the part #'s for the M3), so I thought I would post it for the rest of us. Let me know if I have any of the quantities or part numbers incorrect, so that people don't buy the wrong things because of what I have posted. Any comments, knowledge of future problems, etc. is appreciated! Thanks in advance!

Gaskets/Bolts Commonly Needed when Installing Headers (All Prices Came from Tischer)
2 x Exhaust Gasket (Cylinder Head to Header) - Part # 11621732969 - $31.86 per Exhaust Gasket (cut heat shield off)
16 x Stud Bolt (Cylinder Head to Header) - Part # 11127506203 - $0.74 per Stud Bolt
16 x Hex Nut (Cylinder Head to Header) - Part # 11721437202 - $0.58 per Hex Nut
4 x Hex Bolt (Header to Exhaust) - Part # 11621427586 - $17.26 per Hex Bolt (Can substitute Grade 8, M10-40 bolts)
4 x Hex Nut (Header to Exhaust) - Part # 18301737774 - $1.32 per Hex Nut
2 x Flat Gasket (Header to Exhaust) - Part # 18107502346 - $9.54 per Flat Gasket




Last edited by bigseth2468; 09-26-2009 at 02:31 PM.
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Old 09-25-2009, 11:22 PM   #2
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Nice find. I'm on my second set.

1. Make sure you cut the heat shields off the exhaust gaskets. You will spend 19 hours installing these if you don't.
2. Get them coated. I suggest Swain coatings. It took several weeks to get them back, but well worth it and not much more than regular coatings. Google Swain Tech for more information.
3. Consider getting 4x exhaust to header gaskets. Mine are leaking and I'll be adding 2 more.
4. O2 simulators. Get them and install them while you're doing this install. Best way to keep from getting a CEL. If you install the simulators AFTER you get a CEL, you'll have to have it cleared. It won't clear itself. I've been running the simulators for 500 miles, now. No problems.
5. Yes, the DME will adjust, but you'd be better off getting a header tune to fully take advantage of the new mod. Consider ESS if you can be without your car for a couple days. I really enjoyed it when I had it. AA claims to have a much better tune, but they haven't proven anything yet.

PM me if you need any tips, I've installed them twice, now.

Good luck!
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Old 09-26-2009, 12:05 AM   #3
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Thanks for the tips aggie. Do the headers cause problems if they are not coated? What happened to your first set?
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Old 09-26-2009, 01:02 AM   #4
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No, they don't cause problems, but you'll keep your under-hood temps down quite a bit. Many benefits to this.

I sold my first set when I was going to part out my car. Had a change of heart.

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Thanks for the tips aggie. Do the headers cause problems if they are not coated? What happened to your first set?
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Old 09-26-2009, 09:09 AM   #5
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I have not installed mine yet but wanted to point out that every part supplier shows our header studs and nuts at 16 each but there are clearly 24 holes combined between both headers!!??

Aggie - Are the header to manifold gaskets reusable since they are metal? I had heard this and was curious.
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Old 09-26-2009, 09:54 AM   #6
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I re-used mine this time, I was told that they're fine.

There's only 16 in the head

QUOTE=JB_ZHP;10673560]I have not installed mine yet but wanted to point out that every part supplier shows our header studs and nuts at 16 each but there are clearly 24 holes combined between both headers!!??

Aggie - Are the header to manifold gaskets reusable since they are metal? I had heard this and was curious.[/QUOTE]
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Old 09-26-2009, 10:05 AM   #7
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3. Consider getting 4x exhaust to header gaskets. Mine are leaking and I'll be adding 2 more.
you mean doubling up on the gaskets? 2 gaskets on each connection?
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Old 09-26-2009, 11:03 AM   #8
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Yes. I just added 2 more gaskets. No more leak.
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Old 09-26-2009, 11:38 AM   #9
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Pardon the ignorance, but what's the advantage to these headers with a stock intake and exhaust?
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Old 09-26-2009, 11:44 AM   #10
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Just wanted to point out that the Header to Exhaust bolts (Part # 11621427586) are $17.26 from Tischer. That's $69.04 for four of them plus shipping. I know that they are Inconel, but $70 for four bolts is pretty steep. Some people have said that any old Grade 8 Bolt will work? Do you find this is true or is it just best to cough up the dough for the OEM bolts?
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Old 09-26-2009, 11:53 AM   #11
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Quote:
Originally Posted by bigseth2468 View Post
Just wanted to point out that the Header to Exhaust bolts (Part # 11621427586) are $17.26 from Tischer. That's $69.04 for four of them plus shipping. I know that they are Inconel, but $70 for four bolts is pretty steep. Some people have said that any old Grade 8 Bolt will work? Do you find this is true or is it just best to cough up the dough for the OEM bolts?
Great question...I have been wondering about this as well!
The weather is cooler here now, I have order my o2sim now its time to gather all other parts necessary for the install!
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Old 09-26-2009, 12:03 PM   #12
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Pardon the ignorance, but what's the advantage to these headers with a stock intake and exhaust?
The biggest advantage I am expecting for now is just opening up the exhaust note a bit. Our factory airboxes are pretty well designed as far as efficiency is concerned, but they are also very quiet. Most after market intakes don't yield much of anything other than sound and I have seen some recommend that you keep your stock airbox and just use a high flow drop in filter. As far as keeping the stock exhaust, I haven't decided what I want to do with that yet and won't know until I hear what the headers/stock exhaust combo sounds like. I do know that our header design is probably the most restrictive thing our cars have as far as engine breathability, so that is where I have chosen to start. As Aggie pointed out above, even with intake, headers, and exhaust, you still need to have the car tuned before you will really be utilizing all of those modifications.

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Old 09-26-2009, 12:30 PM   #13
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Suggestion on the bolts.... I just used grade 8s, but I've seen something done that was better.

Drill out the holes on the exhaust slightly, and tap the headers. Use a slightly shorter bolt (calls for M10-40, use a 35 or something). Just bolt straight into the headers. Saves you from having to deal with a nut on the back. They're not exactly fun to get a wrench or socket around.

Saw an installer do this on a friend's car a while back. Looked good.
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Old 09-26-2009, 12:32 PM   #14
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Stock intake is very decent. Just use a good aftermarket filter.

As for exhaust, we're all hoping that the Magnaflow (see my sig) is going to be VERY good for those of us with headers. I think it'll do a good job of muffling it, but allowing much better flow at the same time.

You will see some good gains with headers ONLY. Adam got about 12rwhp with ebay headers. Stock intake, stock exhaust, no tuning.

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The biggest advantage I am expecting for now is just opening up the exhaust note a bit. Our factory airboxes are pretty well designed as far as efficiency is concerned, but they are also very quiet. Most after market intakes don't yield much of anything other than sound and I have seen some recommend that you keep your stock airbox and just use a high flow drop in filter. As far as keeping the stock exhaust, I haven't decided what I want to do with that yet and won't know until I hear what the headers/stock exhaust combo sounds like. I do know that our header design is probably the most restrictive thing our cars have as far as engine breathability, so that is where I have chosen to start. As Aggie pointed out above, even with intake, headers, and exhaust, you still need to have the car tuned before you will really be utilizing all of those modifications.
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Old 09-26-2009, 12:59 PM   #15
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When in doubt...ask Aggie.
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Old 09-26-2009, 01:06 PM   #16
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Suggestion on the bolts.... I just used grade 8s,
calls for M10-40.
So is this the size bolt that we need?
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Old 09-26-2009, 01:55 PM   #17
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Spark Plug Non-Foulers or o2simulators

Also, do you recommend the spark plug non-foulers (HELP! 42002 and 42009) or the o2simulator?

Last edited by bigseth2468; 09-26-2009 at 02:29 PM.
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Old 09-26-2009, 02:02 PM   #18
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The stocker is M10-40. I'd suggest getting something slightly larger (not sure what that would be) and a little shorter. Buy a tap kit for it, tap the headers while they're still off the car.

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So is this the size bolt that we need?
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Old 09-26-2009, 02:03 PM   #19
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O2 simulators. Non-foulers won't fit the Technik cams correctly. The bell housing won't allow you to stack them. Aside from that, the can be flaky. Just get the O2 sims and install them before you crank up the car with the new headers. Easy install.
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Old 09-26-2009, 02:12 PM   #20
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The universal dual output o2sim from the link above?
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