So are you sellin you cattmans?

 

I sold them last year when I returned the car to stock.

 

Got any pics of your install?

 

Nice little write up there pimpin...

Cattman had just got done bustin my bawlz about buying "... particularly inferior imported knock-offs." when I read this and saw the OBX actually performed better for you. Nice...

I'll take my saved $500 to purchase SAFC and spacers now.

Thanks for a little piece of mind

 

I know this has been asked...but in 17 pages I can't find the answer.. instead of using the o2 sims can we use de-foulers on the o2 sensors? Extend o2 wires and use them with the de-foulers? Anyone done this?

 

I'm not sure if anyone has done it yet but I wouldnt see why not. try page 14, 15 or 16 i think we talked about it on one of those pages.

 

I like cattman products and give the owner props for supplying us with quality parts. However you cant beat $380 shipped with a stick over cattmans price. The only advantage I can see is the ease of installation and they may hold up better over time.

I was disappointed when I had mine installed initially though. I had actually lost 7 whp with my header install. I had a cattman y-pipe then had it removed to put on the headers. With Cattman y I dynod at 228 with the headers and NO tune i dynod at 221.

After the tune is totally different story though I spiked all the way up to 250whp. I think I'm the only one so far who showed no gains after install before tune. Lol now that i think of it think I also put out the most HP though with these on. I'm not sure if the other guys have tuned yet. I'd like to see some other tuned WHP numbers with these.

 

Here are the pics...and you guys said it couldn't be done on jackstands...lol

 

Thanks...will re-read those then.

 

Can the ypipe not be heated up and bent so no cutting is needed?

 

can anyone clarify tuning for me?? ive heard several indiv. refer to tuning as many different things so any clarity would help.

 

I'm sure it could but it would be harder then just grinding down the subframe...

Please exit thread and search...noob

 

I was in the same boat as you so i researched and this is what I've learned... someone please correct anything I may have wrong.

When installing headers it throws off your O2 sensors and tells your ECU that there is too much air (i think?) and it evens out the air/fuel mixture by adding too much fuel. Too much fuel being added bogs the engine down and can actually slow your car.

When you get an SAFC or VAFC (air/fuel controller? made by apexi... also called a piggy back system) you can adjust the mixture of air/fuel so that you have the proper mixture to give you the most performance. I've heard you need to get the mixture number as close to 13 as you can.

Youtube apexi to see the SAFC in action. I believe their newest system is called an Apexi Neo. That's the one I'm looking to buy.

I probably have some errors in my explanation so someone help me out if needed...

***EDIT***
My fault... was I not supposed to answer that? Forget anything I said...

But yeah... do the search and do some research or you'll get killed around here.

 

I believe Brian (Cattman) was only stating that exhaust wall diamiter is important. Alot companies use thinner tubing and then, polish to a shine removing more and making them more prone to breaking or cracking. Thats what I got from his post in this tread.

Those are two pretty big adavantages if you ask me. Let look at it like this, you pay $400 to have them installed and the crack and need to be replaced you will have to pay all over again. If you install yourself than its better for you. These have not been proven to hold up yet. These are the best design the have put out and seem to work well. If these things hold up...... Oh boy!

 

Being that these fit 01s, would these work on 4th gens too?

I wish someone would just make an equal length y-pipe. I don't really care about making more power as much as I care about the VQ sounding as good as possible.

 

They will fit for the 4th gens the same as they do for the 5th gens. You just have to figure out what you wanna do with EGR since there is no port for it. Hence why ebay only lists it for 01-03

 

Check my sig, tuned with greddy blue

 

cant wait til i get money for these

 

Good numbers. I wish I didnt sell my EB when I de-modded my other car.

 

Ok, maybe im blind but i can't find where we spoke about extending the pre-cat O2 sensor. How do i do this now? i remember someone talking about don't cut the black wire or something. MY gas consumption is getting poor and i feel like im loosing power so can someone help me with this please.

 

U put out two more whp than me... im not tuned at all...lol and my motor has 156k on it ....lol.... im sure i would make more than 250 if i tune it wit a s-afc .....

 

if u stop flooring it u will save gas...lol . .and i doubt u are loosing power... u just gettin used to the power.... i felt the same way until i ran 13s... lol
...... but dont forget its been hot as hell around here..thats prolly y ur car feel a lil sluggish

 

...i hope its just the weather. been feeling slugish to me ever since the headers were installed. im about to get the O2 sim so i dont have to worry about extending the sensor.

 

Your numbers are the reason I got these headers anyways so I'd certainly hope so. Why don't you tune anyway? You've put down the highest un-tunned numbers yet, I'd love to see where you would be at. I'd say atleast 255+.

I think somthing was wrong with my car at the time. I had felt some random misfires and sluggish performance. About 2 days after my tune my car went blah and left me stranded on the side of the road. I ended up replacing spark plugs, engine flush, new MAF, and cps. I also added a longer intake tube which on the butt dyno seemed to help a bit. Maybe I'll go in for another dyno soon and see if all that made a difference. Lol Maybe I'll break 251!

I have been burning mad oil too.... I think like a quart every 3-4 weeks. I've been debating dropping a new engine in but I don't want to drop another oil burning engine in so I'm a little hesitant.

 

You may be in the same boat I was in when i got mine put on. I didnt gain jack until I tuned.

I belive running rich would cause what your describing.

 

I don't have a piggy back on my car. Is there another way to get it tuned?

 

we are in the same exact boat...my motor is burning oil 2...lol...but imma jus drivie it til it dies...lol...

but as far as tuning goes it will be tuned b4 maxus...i bought a utec about 3 weeks ago but i havent got around to getting it put in......and when i dynoed my car i had a five year old greddy exhast that was clogged and restrictive but that has been fixed and they car pulls better up top....

 

LOL......get a S-AFC...i saw like 3 of them on here for sale...

 

i got a safc 2 for sale if anyone wants it, bought off a kid here cus i was gonna get the obx's but decided to hold off for a while time mid summer 120$ shipped...I know its the wrong place but thought id throw it out there on here

 

My greddy sucks too. When I was getting the headers put on I had noticed some bad rott. have you seen that OBX double tip universal exhaust? It was like $50 dollars and looked pretty good. I had thought about getting it. It's a 3" inlet with 3.5" dual tips.

 

exhaust looks good, i saw it but it was more than $50... lucky you

 

I've got my secondaries plugged into my down pipe before the high-flow cat with no MIL ever.

No wideband required. Just plug them into bungs on the downpipe. No problem for me.

 

Well the price is $45 but the shipping is $15 so I guess it is more than $50. Heres the link if your still in the market.

Click for link

 

i got my dual tips already, the only thing i dont really like about the tips is just the fact that they are slanted... other than that, good looking tip

 

Any dimensions on these headers?? compared to cattmans or old OBX i.e 4th gen. There is a lovely comparison on the old ones in the All motor section I think but i really want to know about these headers. With the one Vid that I saw, I like the way they sound and I am willing to get these and get an EGR *** welded on and save the much needed $400 to pay for new rubber for maxus!!

 

anyone of the headers fits the 4th gen the same... ur moreso buying them for looks now, which is cool if u want

 

Well. I got these in finally.
These is a lot of back and forth information regarding the install. Grinding out mounts, cross members, O2 locations, etc.
First, to clarify things, here are the "modifications" needed in order to make these headers work. They were not, let's just a say, a "perfect" fit:

1. Cross member, rear motor mount bracket, and rack heat shield had to be cut.
2. I had to extended my primary O2s. I probably could have left the front one alone and just bent the bracket down a little. However, that would have left the wire with absolutely no slack, so I did want to go down that route.
3. Rear primary 02 had to be re-routed as it would have rubbed on the rack. So I drilled a hole perpendicular to it, welded in a new bung, and extended the O2 wire.
4. My Blehmco Stage II LTB fits just fine. I am sure a Stage I would fit as well.
5. No O2 sim installed. Won't have to as long as the secondaries are screwed in.

For the money, I highly recommend these headers. Pics will be in tomorrow. Dyno later this week after Wideband install and tune.

 

Yes you will. The sims aren't only for not having an O2 at all, they're also to keep you from getting catalyst efficiency codes. Without precats where the ECU expects them to be, it's gonna throw a code.

 

im actually glad at the last part of this, cause i've asked what if i choose not to do the o2 sim and just screw in all 4, and IIRC someone said the SES light would still come on because u eliminate the cat that they monitor... glad thats now answered

 

well thats that