XO2 Tubular Exhaust Manifold

[98evoIIIpwr]

I agree with the above mentioned about being too much trouble... I mean you can get a lifetime warranty but who wants to worry about their turbo falling off in the middle of a 1/4 mile run?? Besides there are cast variants that will perform as well if not close to as well as the tubular manifolds made today. To each his own but id rather save a couple hundred buy a good flowing cast manifold (i.e. FP ) and not have to worry. This especially applies to a DD seing as the road conditions create more vibration and all.

 

[BaileyBoy]

I've done alot of research on tubular exhaust manifolds, and my conclusion is they're more trouble than they're worth. They all crack eventually (DNP included), and overheat stuff under the hood, destroying alternators, melting fans etc.. Probably the only one I would buy that doesn't cost a grand is the OBX one because it has a lifetime warranty, and when it cracks you can get a new one for free (still a pain because you have to change it out). If your building a race car you may want to go with a high dollar one, but otherwise it's ill advised.

Yea, I guess I'll see how it goes then, if it doesnt work out...tough im out about a 150 not to bad. I'll do a write up tho.

I see your from Michigan too, do you ever run at knoll raceway park??

 

[Puscifer]

I just went to bolt this exact manifold up to my car this evening after about 2500 in upgrades and this being one. Sadly the width on the exhaust ports from the block are 50mm exact and the ones off the manifold range from 39-41.3 and lacking anywhere from 1-3mm in height per

I'm not going to bash them about it but eh.. i'm seriously not happy at all. oh and they're also refusing to exchange it for me. (just got the e-mail response) fun fun.

 

[silverbullett]

I just received this Xo2 manifold. The exhaust manifold studs are too long. I cant get the flange to sit flush with the head. I'm going to have to grind the studs down. Anyone else have this issue?

 

[chicagoavenger]

Why not try using a few extra lock washers?

 

[supravw]

Why not try using a few extra lock washers?

I think you missed what he was saying, the manifold is hitting his studs, not allowing the manifold to sit flush with the exhaust ports on the head. You can't really add washers BEFORE the manifold goes on, can you say massive exhaust leak!

I'd say either shorten them, use bolts instead of studs or stack some gaskets.

 

[silverbullett]

Bolts are definitely an option for me. Thanks for the suggestion. Do you happen to know the thread size and pitch so I can do the switch(didn't mean to rhyme)?

 

[kawboy]

Link to the auction that you guys purchased?

 

[blcknspo0ln]

Why not try using a few extra lock washers?

+1, or just go to ACE hardware (or whatever is near you) and buy some automotive studs that fit.

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I think they were 10x1.25. Just take the stud that fits to the store and match 'em up.

 

[kawboy]

For good measure

My friend purchase this exact manifold:

eBay Motors: Eclipse Talon 1G 2G DSM Turbo Manifold T25 T28 (item 290187774222 end time Dec-08-07 17:46:55 PST)

Same thing as the Xo2 manifold, just comes in a different box. Hits studs, small ports, etc

 

[kawboy]

+1, or just go to ACE hardware (or whatever is near you) and buy some automotive studs that fit.

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He said exhaust manifold to head

Thats exhaust manifold to turbo

 

[silverbullett]

The studs in the head hit the primaries. The flange to the turbo was fine. Thanks for the quick replies.

 

[kawboy]

Did you buy it from XO2 racing or from one of the other ebay manifold companies?

Contrary to popular belief, they are NOT all the same

 

[silverbullett]

Xo2. I don't know why this one was made this way.

 

[supravw]

If I'm not mistaken the bolt size is a 8mm by 1.25 for the exhaust stud holes.

 

[silverbullett]

Dude, you've been beyond helpful. Thanks a million.

 

[BaileyBoy]

i bought the xo2 one and ive measured it and things dont look good. the outlet to the turbo measures only 5.5cm and the individual primary holes on the flange are only about 3.5cm. What are the measurments on a typical cast mani??

 

[mitsuclipsegsx]

I've done alot of research on tubular exhaust manifolds, and my conclusion is they're more trouble than they're worth. They all crack eventually (DNP included), and overheat stuff under the hood, destroying alternators, melting fans etc.. Probably the only one I would buy that doesn't cost a grand is the OBX one because it has a lifetime warranty, and when it cracks you can get a new one for free (still a pain because you have to change it out). If your building a race car you may want to go with a high dollar one, but otherwise it's ill advised.

My dnp hasn't.Been over a years. And with the pte bb 50trim,272cams and magnus,i see full boost ~3700

 

[kawboy]

i bought the xo2 one and ive measured it and things dont look good. the outlet to the turbo measures only 5.5cm and the individual primary holes on the flange are only about 3.5cm. What are the measurments on a typical cast mani??

Those are the measurements of a typical manifold... 7cm^2 openings = 6cm, 6cm^2 openings = 5.5cm

Take some pics, and bolt it on, let us know how it fits

Don't go crazy about just measurements

 

[BaileyBoy]

i took pics today, gimi an hour i'll load them up....i was just worried ### the primarys looked really small

 

[BaileyBoy]

here ya go some pics, sorry the last measurment is fuzzy, but the opening on the block flange is roughly 3.4-3.5 cm.

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And here is the begining of my parts stack for my spring break install
Prosport boost gauge, lc-1 wideband, hallman pro boost controller with interior adjustment cable, Greddy type rs bov w/ recirc fitting, Full length clutch line (reservior bypass), megan racing downpipe, xo2 racing manifold

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[kawboy]

I'd be more concerned about bolting that megan downpipe to your stock o2 housing.. it doesn't work

I talked to the ppl at Megan and they are gonna make a revised downpipe (v3) next year

Get a tubular o2 (for it to fit) if you haven't already.. then your exhaust setup will be exactly the same as mine, minus the catback

 

[kawboy]

Do the runners on the manifold pinch down where they meet the collector (5.5cm opening) or is that just the angle of the pic?

 

[Puscifer]

I finally got ahold of xo2 today and i was told 2 people in thier staff make the manifold. aparently one doesn't know what the FU*k he's doing because those are the bad ones being sent out. But, regardless they're being silly by not exchanging the product or even giving me a discount for a proper crafted one. Seriously though the one i have has clearance problems from the exhaust studs.. no biggy i can get some bolts but losing up to 9mm in diameter on the runners is just unacceptable. knowing i'm not the only person that's happened to and there's no final inspection on them is enough to turn me away from the company for good.



Dosage

 

[kawboy]

Do you have any comparison pics of the runners vs say a EVOIII cast or something?