Thread: OBX Header Install is Done!!

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  1. #1 OBX Header Install is Done!! 
    Donating Users Uno99's Avatar
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    Let me start by saying I knew this install was not going to be easy and I know there are better headers out there there that I could have bought. So we dont need to go there. I did it becuase only a few of us have tackled this install and Im the type of person that is will to go through some pain to help other out. So with that said..................Here my help.... dont bother getting these headers.

    WOW what a PITA. Not really sure where to start with all the issues.

    #1 NO HARDWARE WAS INCLUDED. Only crappy gaskets

    #2 They use the same flanges on the front and rear header which have EGR provisions on both of them. On the rear that is fine you can use it or block it off. However, by using the same flange on the front you have to cut it off otherwise the flange its the coolant hose connection on the passenger side of engine. Now it can be cut with a saw zaw BUT YOUR GONNA GO THRU ALOT OF BLADES cuz the flange in 3/8" thick. I just took mine to a local machine shop and had it cold cut with a band saw.

    #3 The crossover pipe does not fit correctly either. I had to cut it in half and test fit it until it was right and then have my buddy re-weld it.

    #4 The Y-Adapter was expanded about 1/16" to much so I had to rent a pipe expander and expand the end of the crossover pipe to get a good seal

    #5 Once the front header was on I notice it was only 1/16" away from the cooling fan harness. I had to rotate the fan and re-mount it so the harness was not by the header. I then had to trim the fan shoud down so it would not be melted.

    In the end my opinion is.......The quality of the weld and steel is nice but if you are a driveway mechanic with limited access to tools DO NOT GET THESE HEADERS. Its just not worth all the messing around.







    Did I mention I had to replace the head gaskets too? I bought the ZZP engine gasket kit and replace a few gaskets along the way. I also forgot to thank my new friend JEREMY aka 03impala19c he was a huge help. When we had the rear head off we just dropped the rear header in and put the read head back on that was nice.








    02 GTP VS CAM / 3.2 MPS / CAI / SD HEADERS Catless DP & E-Cutout / AEM WB / HPTuners
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  2. #2 Re: OBX Header Install is Done!! 
    GT Level Member riceburner's Avatar
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    do you have a link to where you bought those? just so we know what not to buy and where from?
    '01 GTP mods: K&N intake, autolite 104's, drilled 180*, !u-bend, !EGR, ported s/c, polished heads and TB and a LOT more whine
    '99 firebird mods (1 of 6): LS1 swap, custom exhaust, LS6 IM, RA intake, and a few suspension parts
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  3. #3 Re: OBX Header Install is Done!! 
    Donating Users Curtis's Avatar
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    they sure are purdy though.
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  4. #4 Re: OBX Header Install is Done!! 
    Donating Users Uno99's Avatar
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    Quote Originally Posted by riceburner View Post
    do you have a link to where you bought those? just so we know what not to buy and where from?
    No link but the seller was RACINGPARTSDEPOT just beware of anyone selling the OBX headers for the 3800.

    02 GTP VS CAM / 3.2 MPS / CAI / SD HEADERS Catless DP & E-Cutout / AEM WB / HPTuners
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  5. #5 Re: OBX Header Install is Done!! 
    The mod from over yonder TheOtherNick's Avatar
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    How hard where they to get to seal after you expanded the cross over?
    01 gtp-big cam e85 dd 78dodge- guzzling fuel 05 cummins- rollin coal
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  6. #6 Re: OBX Header Install is Done!! 
    The Blue One blueguy's Avatar
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    Quote Originally Posted by Curtis View Post
    they sure are purdy though.
    wait until it runs for a few days and they turn all rusty
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  7. #7 Re: OBX Header Install is Done!! 
    Bastard Reptile's Avatar
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    Quote Originally Posted by bluegtp91 View Post
    wait until it runs for a few days and they turn all rusty
    They're stainless........
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  8. #8 Re: OBX Header Install is Done!! 
    The Blue One blueguy's Avatar
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    Quote Originally Posted by Reptile View Post
    They're stainless........
    Yeah, but my buddy had a OBX Header on his 420A '99 Eclipse. It looked just like that one when we put it on...now it looks like the non-coated Pacesetter's...so idk
    Sold WBody's: '03 Blue GTP/'98 Green GTP/'98 Silver GT/'05 GXP
    '99 Chevrolet Silverado Classic Z71 4x4 - K&N Intake/Gibson Exhaust #TRUCKTHINGS
    '12 Buick Regal Turbo - ZZP CAI/20% Tint/HID's
    '89 Ford Mustang LX Notchback - LM7 5.3, 4L80, 9", HX40
    '04 Chevrolet Corvette MRM A4/LS1 - TSP LT's, 3"O/R X, AFE S2 CAI
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  9. #9 Re: OBX Header Install is Done!! 
    I say it with pictures Abrasive's Avatar
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    Welding hood FTW!

    Master Certified Auto Glass Technician - 23+ yrs in the biz.
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  10. #10 Re: OBX Header Install is Done!! 
    GT Level Member riceburner's Avatar
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    seriously! i could see that pic ending badly!
    '01 GTP mods: K&N intake, autolite 104's, drilled 180*, !u-bend, !EGR, ported s/c, polished heads and TB and a LOT more whine
    '99 firebird mods (1 of 6): LS1 swap, custom exhaust, LS6 IM, RA intake, and a few suspension parts
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