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Old 05-06-2004, 07:11 PM   #1
FstEddie22
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Default Cobb Header Install

Okay, so after about 3 months of it sitting in my room, I finally installed my Cobb Equal Length Headers since I'm on break.

What would normally take most people here an hour or so to install, took me about 3 hours on my own. Definitely get someone to help you unless you want the stock exhaust to fall on you when you remove the last bolt (as someone pointed out, it is heavier than it looks). As another note, be careful when you finish the install. Stupid me got under the car to check for leaks and nicked the million degree header with my thumb crawling out. Needless to say, I don't think I have a finger print on my thumb anymore.

Now for the good stuff. Unfortunatley the car did lose it's raspy boxer four sound that my Brullen gave it. I wouldn't go to the extreme and say it sounds like a civic like others have, but it definitely is more free flowing and a little higher pitch. Once the car reaches 4k RPM though, all bets are off. The car turns into a one mean sounding machine. It's so awesome that it makes such a sudden change at a distinct point on the rev band. I was dissapointed with the headers until I drove for about 5 minutes and finally punched it. The sound alone is worth it.

As for power, I'm going to have to get back to everyone on this. I only got to drive around my neighborhood and through rush hour so I haven't been over 45Mph. Hopefully I'll get to go out late when the roads are empty to do some red light launches. I'll let you know.

Ed
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Old 05-06-2004, 09:10 PM   #2
Matt Monson
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A little pointer for folks trying this on their own. Use a a floor jack to catch the back end of the stock unit when you are lowering. And use it again to help lift the new unit into place. And if you don't have a floor jack, the spare jack will work to catch, just not to lift...
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Old 05-06-2004, 09:42 PM   #3
Nicklbrso
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Please post a sound clip
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Old 05-07-2004, 12:20 AM   #4
HeyChris
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I'm sorry. I must be confused... You had these 4 THREE MONTHS, just sittin pretty @ your place? I dunno how you could stand it!

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Old 05-07-2004, 12:24 AM   #5
ttboy19
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I'm happy with the performance from the headers, but the sound gets to me sometimes. I'm still getting the slight rattling noise, but I block it out of my head most of the time.
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Old 05-07-2004, 01:20 AM   #6
HeyChris
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Branden, [Rb5] has them too.. He luvs them... so much that mere mention of them causes a fricken giggle of deviousness...

He also says there's a random rattling that comes n goes. he did something to fix it. But I forget what....

C.
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Old 05-07-2004, 08:20 AM   #7
FstEddie22
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Default Cruisin'

Hey Guys,

Heres my update: Drove out and about at 11 last night to go get some cofee. I definitely see a big torque increase all throughout the power band. Gas peddle is way more touchy than before. Don't need a but dyno because I can feel it in my neck everytime I launch. I drove 4 friends home in my car and I noticed how much the extra torque helped. I normally drive my roomate and my friend around and have a hard time getting a meaningful reaction from the gas peddle with the extra 400lbs. in the car. You can also expect the car to be louder under normal driving. Not sure how obnoxious it is yet because I used to think the Brullen was loud before I got used to it (stock the car is pretty damn quiet). I do know that it doesn't really drone and won't make you go deaf in the backseat like the exaust of most ricers.

Some extra things of note: My only other two power mods are a Ganzflow intake (saving for a Cobb), and a Brullen exuast. I also didn't reset my ECU, someone said it always screws up his gas mileage for awhile. My mom's car was down to the fumes and I spent $33 to fill it up with 16 gallons of premium. For here, that is amazingly high.

HeyChris: I go to school away from home and all my tools are at home. I was supposed do it last spring break, but ended up doing house chores the whole time. It killed me to wait, but my mom doesn't need to be doing yard work or anything of that sort if she doesn't have to.

Matt Monson: Using a Jack if you're by yourself is an excellent idea. I just made the mistake thinking that the exaust wouldn't be that heavy, after all, I've been working out I think most of the weight comes from the two cats. My Cobb system with the high flow cat is noticeably lighter. Maybe I shaved 5-10 lbs?

Nicklbrso: I would post a sound clip if I had something to record it with. Wanted to get a digital cam, but you can guess what I spent the money on. This higher education thing better pay off in a year. Finance major from the University of Florida up for hire!

ttboy19: Not sure where you're rattling is coming from. I haven't noticed any yet. Did you use the stock spring bolts that connect the midpipe to the cat?
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Old 05-07-2004, 08:33 AM   #8
ttboy19
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Actually I'm not using the spring bolts. Maybe I should try using them and see if the rattling goes away.
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Old 05-07-2004, 11:07 AM   #9
FstEddie22
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I'm not using the stock spring bolts either because I didn't have enough leverage under the car to compress the springs. I ordered two bolts from Cobb that come with the WRX exhaust systems. As it turns out though, they are just the same bolts that they give you with the headers for our car. The ones that connect the headers to the cat. They are a perfect fit though with the midpipe. The bolts are made in sets with the gaskets so they charge like $6 dollars for them. Might be worth a try.

Ed
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Old 05-07-2004, 06:33 PM   #10
obyone
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Did you used to have a brullen headers?
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Old 05-07-2004, 08:19 PM   #11
Matt Monson
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I have the spring bolts and had the rattle for the first two months. For some reason it has recently gone away.

One other note, I got the CEL fix-it extension that Flat4 and a few other vendors are selling. It worked for about 150 miles and then the good old 0420 CEL came back. I reset it again, and this time it only took 90 miles to pop. I wouldn't spend any money on that thing again...
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Old 05-07-2004, 09:13 PM   #12
FstEddie22
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obyone: I never had Brullen headers. I have the Brullen exaust and midpipe.

Matt Monsoon: You don't know how dissapointed I am to hear that you got a cel code. Everyone's reviews so far have been positive for the extender and people have been saying that they have gone like 300 something miles without a light. I have mine and I hope a miracle happens.
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Old 05-07-2004, 09:37 PM   #13
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Quote:
Originally posted by Pogi22
obyone: I never had Brullen headers. I have the Brullen exaust and midpipe.

Matt Monsoon: You don't know how dissapointed I am to hear that you got a cel code. Everyone's reviews so far have been positive for the extender and people have been saying that they have gone like 300 something miles without a light. I have mine and I hope a miracle happens.

Too bad...I still want to see how much of a difference the COBB or TWE headers make compared to the MRT and Borla's.
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Old 05-09-2004, 01:55 PM   #14
FstEddie22
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I think I know what you guys are talking about concerning the faint rattling noise. Under hard acceleration, I get a faint rattling. Didn't really notice before because the exhaust sound overpowers it. Look under the car and couldn't think of anything that could be causing it. Possibly inside the cat somehow?

Some people love this, but I get way more backfires now after letting go of the gas. I guess it's sorta sweet, but I also find it somewhat annoying. As for the exhaust sound in generall, I'm starting to get used to it and it's growing on me. Played around at the light with my friends civic and my car definitely sounds better.
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Old 05-09-2004, 08:50 PM   #15
BlackAndBlue
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did you have to modify the plastic skid plate under the car? i heard you had to cut it
I'm wonderin because I'm goin to fab my own metal skid plate this summer, probably before I get the headers in...
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Old 05-10-2004, 01:45 AM   #16
CatchMyDrift
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I've removed my exhaust about 17 times. Those were lonely nights.....
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Old 05-10-2004, 02:45 AM   #17
FstEddie22
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BlackAndBlue: I had to cut a small portion of the skidplate on the passenger side. Trimmed maybe an inch deep off of the edge of it.

Where does everyone scan their CEL codes. I freaking got mine today after about 100 miles. I assume it's the headers but want to make sure since I changed out the spark plugs last tuesday. My question is, did Flat 4 test these stupid things out? Can't believe I spent $20 on this piece of crap. Other people have gone like 300 miles, but I wonder if they were highway. My CEL came on during my 70 mile trip to Gainesville from Jax. 70MPh most of the way. Very annoying.
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Old 05-10-2004, 10:31 AM   #18
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As you probably already know, Autozone will scan codes for free... I ended up buying one though; It's a lot better than driving somewhere with the CEL on, hoping theres nothing seriously wrong. I keep it in my car so I can pull the code where and when I need to. For about $80 - $100.. I think it's a good investment.
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Old 05-10-2004, 10:35 AM   #19
FstEddie22
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Thanks SjYankee006. I didn't know that Autozone scans for free. I guess I'm going to go there to day and see what code comes up. I'm going to see if there is a way to fix the problem before I buy a scanner.
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Old 05-10-2004, 02:57 PM   #20
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Murrays will also scan CEL codes for free.
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Old 05-10-2004, 03:02 PM   #21
Charlie-III
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I wonder if everyone that installed the COBB header is using the later model donut gasket.

I have a 1998 Legacy and the replacement is smaller than the later RS donut, thus it would allow movement of the joint and possible noise.

Also, are you running the stock hangers or did you get new heavy duty ones (COBB and KartBoy both make them) since it can make a difference in noise. The performance exhausts are a bit bigger in size and thus don't have as much clearance to the chassis and other parts.
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Old 05-10-2004, 03:46 PM   #22
chrhon
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Last I heard people were getting CELs even with the flat4 O2 extender, I've had mine for about 200 miles and no CEL so far but based on other's experience I'll probably be seeing one soon.

I have no rattling - never have. I am using the original "donut" as black and crusty as it was (didn't know about that gasket when I did the install or I would have bought a new one). My catback is stock.

BlackAndBlue - I didn't have to cut my stock skiplate at all (pictures of my install here: Header install thread - about 2/3 the way down the page are the install shots ).

For a skidplate I ordered one specially designed for the cobb headers from rallyarmor (I worked with them to design it )
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Old 05-11-2004, 12:19 AM   #23
FstEddie22
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I have the gasket for my model car. I don't think the rattling is coming from that because I bought a new one and it was kinda hard to fit on. It's extremely snug. I have the Brullen hangers that I got with the exaust. Didn't get rattling when it was just the exaust so I don't think it's them.

I didn't get to scan my car today. I'm going to try and do it first thing in the morning. Damn Cel.
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Old 05-11-2004, 06:51 PM   #24
Canadian 2.5RS
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so what cures the p0420 code? i have brullen headers and i get that code too. Is there anything that will make the CEL go away?

I was about to put an order in on the flat4 extender but im glad it didn't go through. Has anyone used the rallitek mech CEL fix?
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Old 05-11-2004, 09:41 PM   #25
HeyChris
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the easiest way to make the CEL go away is to unplug the light, or stick black electrical tape where the light shines through....
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