OBX Headers have arrived and ........

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Apr 14, 2009 | 09:53 PM

#181

Sinister-one

Le Mans Master

Joined: May 2008

Posts: 5,892

Likes: 47

From: Helotes TEXAS

Quote:

Originally Posted by T_Vert

He is modifying the TI's so they are louder. They will bolt right up. Sinister, didn't you go w/ Dynatech cats? know of anyone who sells that cat w/ the flange already on it to bolt up to a 4 bolt collector like the OBX and dynatech?

Dave

You are correct on the Ti mod I'm looking to get done. They have a REALLY good sound to them right now, but I hear they sound even better with the bypass mod !

Yes I did find some Dynatech cats for cheap on fleabay a while back. If I hadn't found them I was going to buy some highflow cats and have the flanges from the resonators cut and welded to the new cats.

I've had mine on for a while. I guess I can provide some pics as well. That is if you guys don't mind looking at dirty headers...

Apr 14, 2009 | 10:15 PM

#182

T_Vert

Le Mans Master

Joined: Oct 2003

Posts: 6,126

Likes: 19

From: Streamwood illinois

Quote:

Originally Posted by SoSlow1

I'll check question #1 when I work on it tomorrow afternoon.
No pics of the hole but took a 1" holesaw and was a little overkill but made plenty of room..
The wires on top the passenger header 02 may be rubbing the tunnel cover slightly..
Last question no problems at all..I'm running Taylors and are not any closer to the OBX's as they were to the stock manifolds...

do taylor wires have that metal cover on them like the stockers?do you have the wires passing through this hole or just up and back down and out of that hole you made? I have a nice thick aluminum one I'd hate to cut

Pics would be great sinister
Dave

Apr 14, 2009 | 10:22 PM

#183

Chrisrokc

Drifting

Joined: Mar 2003

Posts: 1,533

Likes: 171

From: Oklahoma City OK

Thanks for the info for the size of the hole needed. I saw a picture of a hole cut, it was HUGE. Maybe they just did it over kill style. Anyways 1" shouldn't be a problem.

I like that idea on getting those flanges welded onto the high flow cats.

Apr 14, 2009 | 10:23 PM

#184

SoSlow1

Geaux Tigers!!!!

Joined: Nov 2007

Posts: 2,732

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From: DeRidder LA

St. Jude Donor '08 thru '26

Quote:

Originally Posted by T_Vert

Pics would be great sinister
Dave

No the Taylors do not have the metal covers...The wires out of the 02's are just up and back down out of the hole...

Apr 14, 2009 | 10:43 PM

#185

T_Vert

Le Mans Master

Joined: Oct 2003

Posts: 6,126

Likes: 19

From: Streamwood illinois

Also another question that may be dumb but if the o2 wires in front are rubbing already, how did you get the o2 sensor in there? Did you put them in first?

Dave

Apr 14, 2009 | 10:43 PM

#186

jgump

Drifting

Joined: Jul 2006

Posts: 1,375

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From: Shelby Township MI

How high was the car (rocker panel) off the ground?

Thanks,

Apr 14, 2009 | 10:57 PM

#187

Sinister-one

Le Mans Master

Joined: May 2008

Posts: 5,892

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From: Helotes TEXAS

Quote:

Originally Posted by T_Vert

Also another question that may be dumb but if the o2 wires in front are rubbing already, how did you get the o2 sensor in there? Did you put them in first?

Dave

While the headers are hanging and not completely bolt onto the heads is when you screw in the O2's.

Apr 14, 2009 | 11:02 PM

#188

T_Vert

Le Mans Master

Joined: Oct 2003

Posts: 6,126

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From: Streamwood illinois

only problem w/ this is that to replace the o2 sensor you need to unbolt the entire header and part of the exhaust.

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Apr 14, 2009 | 11:08 PM

#189

Sinister-one

Le Mans Master

Joined: May 2008

Posts: 5,892

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From: Helotes TEXAS

Quote:

Originally Posted by T_Vert

only problem w/ this is that to replace the o2 sensor you need to unbolt the entire header and part of the exhaust.

You are correct. And you'll have to drop the header as well if you need to replace the starter.

Apr 14, 2009 | 11:15 PM

#190

T_Vert

Le Mans Master

Joined: Oct 2003

Posts: 6,126

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From: Streamwood illinois

actually you can just unbolt it and swing it out of the way to replace the starter. Ive had to do that already.

Dave

Apr 15, 2009 | 12:05 AM

#191

SoSlow1

Geaux Tigers!!!!

Joined: Nov 2007

Posts: 2,732

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From: DeRidder LA

St. Jude Donor '08 thru '26

Quote:

Originally Posted by jgump

How high was the car (rocker panel) off the ground?

Thanks,

If you are asking how high I got the car to change out the exaust its 20 inches at the Y pipe...

Apr 15, 2009 | 12:11 AM

#192

SoSlow1

Geaux Tigers!!!!

Joined: Nov 2007

Posts: 2,732

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From: DeRidder LA

St. Jude Donor '08 thru '26

Quote:

Originally Posted by T_Vert

Also another question that may be dumb but if the o2 wires in front are rubbing already, how did you get the o2 sensor in there? Did you put them in first?

Dave

There is enough room to get it turned into (the bulb part of the 02) the bung ..Its a tight fit and I didn't even think to put them into the header before I bolted them up..

Apr 15, 2009 | 12:39 AM

#193

0Double D Mods

Former Vendor

Joined: Sep 2005

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From: Hazel Green, Wi www.doubledmods.com

St. Jude Donor '12-'13

These are now available for ordering on my website for $599.99

more to come for post. I just got info done and added to website inbetween the 38 double din bezels i have to make

www.doubledmods.com

http://www.doubledmods.com/product.s...0&productId=31

Last edited by Double D Mods; Apr 15, 2009 at 08:23 AM.

Apr 15, 2009 | 08:54 AM

#194

Sinister-one

Le Mans Master

Joined: May 2008

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From: Helotes TEXAS

That's the same price as fleabay.......

Apr 15, 2009 | 10:50 AM

#195

Quickshift_C5

Melting Slicks

Joined: Sep 2006

Posts: 2,728

Likes: 142

From: Iowa

So with you guys having such great luck fitment and quality, I guess I'm curious what kind of power you guys might gain from these OBX Longtubes before committing myself to a more expensive setup.

Would love to hear about your dyno results ASAP!

Apr 15, 2009 | 11:03 AM

#196

Sinister-one

Le Mans Master

Joined: May 2008

Posts: 5,892

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From: Helotes TEXAS

Quote:

Originally Posted by Quickshift_C5

'03vettemaniac' had his dyno'd and here's his results...

Numbers Are In!!

Just got it dyno tuned by Charlie at RPM. Before the headers I had the Vararam, Borla Cat Backs, 3.42's and a dyno tune with RWHP 326. Now with the OBX headers and great tune by Charlie I got 356 rwhp and 365 ft-lb of torque! I asked Charlie how these headers compared with others and he said they were slightly above average in the hp gain and that the torque was the really impressive thing. I will look for my old dyno sheet and let you know the peak torque back then. If i remember right the peak torque was less than 320 ft-lb.

Looks like 30 HP more with the headers. Not bad for "cheap" headers !!

I'll be dyno tuning mine next month after I install my cam. I'll post up my results shortly thereafter.

Apr 15, 2009 | 11:09 AM

#197

Espresso

Instructor

Joined: Dec 2008

Posts: 157

Likes: 0

Ha, that is wonderful to know.

Apr 15, 2009 | 12:09 PM

#198

dblack

Racer

Joined: Mar 2009

Posts: 250

Likes: 1

From: Huntsville Al

How bad is the fuel smell with these and no cats?

The vette is my DD and I don't want to be smelling like a gas station when I get out.

Apr 15, 2009 | 12:10 PM

#199

Chrisrokc

Drifting

Joined: Mar 2003

Posts: 1,533

Likes: 171

From: Oklahoma City OK

So let me get this right.... I am going to need all of this

OBX Header System
2 12" or 24" O2 Extensions?
Header Bolts

Apr 15, 2009 | 12:16 PM

#200

Sinister-one

Le Mans Master

Joined: May 2008

Posts: 5,892

Likes: 47

From: Helotes TEXAS

Quote:

Originally Posted by dblack

How bad is the fuel smell with these and no cats?

The vette is my DD and I don't want to be smelling like a gas station when I get out.

I run high flow cats, so I really couldn't say.

Quote:

Originally Posted by ChrisRTA

So let me get this right.... I am going to need all of this

OBX Header System
2 12" or 24" O2 Extensions?
Header Bolts

OBX Header System -------------- YES
2 12" or 24" O2 Extensions? ------- YES
Header Bolts---------------------- NO

You can reuse your existing exhaust manifold bolts. What you will need is:

4 - 1 1/2" long 3/8 bolts
8 - flat washers
4 - lock washers
4 - nuts.

Peferably in stainless. I picked all mine up at Lowes for about $3 bucks.

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