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08-19-2012, 04:41 AM
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Hummer Professional
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Join Date: Sep 2008
Location: Utah
Posts: 293
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Re: Dynatech Headers
Yah, so the cortex was something I got after the bigger tires. It helped, but the regear is what really picked thigns up. The chip just helps things run a little sharper, figured opening up the intake and exhaust would help.
On the O2's, I just got the high flow cats from Dynatech which came with the extenders. I am pretty sure you need them so that the O2's can still reach. Also, no on the EGR, don't have it hooked up in this pic; speaking of which, I didn't know the H2 had an EGR.... Does it even have one?
__________________
Sweet looking H2 with not enough mods (2003 Pewter H2, 20" Rockstars, 40"x15.5" Toyo MT's, E&G Extended Flares, Full body tube steel exoskeleton, 5" Skyjacker lift, Amp Research steps, Gobi Roofrack and ladders, Smoked LED's, AFe CAI, Dynatech long tubes and cats, Magnaflow exhaust, Stock tune, 4.88 gears, Chrome Grenade Shifter, interior blacked out, rear captains chairs, Solar Power!!)
Last edited by H2Much : 08-19-2012 at 04:43 AM.
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08-19-2012, 08:33 AM
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Hummer Expert
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Join Date: Feb 2008
Location: Portland, OR
Posts: 948
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Re: Dynatech Headers
My buddy swears it has an EGR but says it just doesn't run through the header, but through the back or front of the head.
You've been running yours without a plug On the header???
__________________
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2006 HUMMER H2
MOOG Front End
Diablo InTune w/DiabLew Tune
Cognito Steering Support
OBX LT Headers
Air Raid Filter w/Tube
External Trans Cooler -Radiator Bypass
Corvette Servo
Rancho 9000 Adjustable Shocks-
Rancho Steering Stabilizer
20" Chrome Fuel Hostage - Cooper ST Maxx
Slotted Rotors/Ceramic pads/Steel Lines
Viper Smart Start
iPod/Video Interface
HID Head and Fog Lights
Optima Red Top w/ Priority Start Cut Off Mod
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08-19-2012, 11:38 PM
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Hummer Professional
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Join Date: Sep 2008
Location: Utah
Posts: 293
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Re: Dynatech Headers
Yah, I have... haven't really notcied anything weird about how it runs either. I will have to see of I can get something to plug it, see if it makes a difference. I will talk to my mech and see what he says about it, they do quite a bit of performance stuff like exhaust and supercharge, so he should know what's up. I may even call Dynatech and ask them too; got me all thinking about it now.
__________________
Sweet looking H2 with not enough mods (2003 Pewter H2, 20" Rockstars, 40"x15.5" Toyo MT's, E&G Extended Flares, Full body tube steel exoskeleton, 5" Skyjacker lift, Amp Research steps, Gobi Roofrack and ladders, Smoked LED's, AFe CAI, Dynatech long tubes and cats, Magnaflow exhaust, Stock tune, 4.88 gears, Chrome Grenade Shifter, interior blacked out, rear captains chairs, Solar Power!!)
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08-20-2012, 12:03 AM
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Hummer Expert
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Join Date: Feb 2008
Location: Portland, OR
Posts: 948
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Re: Dynatech Headers
I can't believe you haven't noticed the exhaust leak sound... I'm about to plug mine now.
What did you do with your plug wires on the driver side? I have two plug wires that are up against the header, no way to move them out of the way, and they're burning up.
Do you have a pic of your driver side header?
Did your motor throw any codes?
__________________
_____________________________________
2006 HUMMER H2
MOOG Front End
Diablo InTune w/DiabLew Tune
Cognito Steering Support
OBX LT Headers
Air Raid Filter w/Tube
External Trans Cooler -Radiator Bypass
Corvette Servo
Rancho 9000 Adjustable Shocks-
Rancho Steering Stabilizer
20" Chrome Fuel Hostage - Cooper ST Maxx
Slotted Rotors/Ceramic pads/Steel Lines
Viper Smart Start
iPod/Video Interface
HID Head and Fog Lights
Optima Red Top w/ Priority Start Cut Off Mod
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08-20-2012, 12:50 AM
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Hummer Authority
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Join Date: Sep 2005
Location: Texas
Posts: 1,795
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Re: Dynatech Headers
These headers come with an Allen head plug already installed in the EGR port, instead of a bolt on plate like most other headers, thus the reason it looks like there is not one there. Trust me, it comes installed already. It screws into the hole.
__________________
H2 SUT 4.56 Gears, Front Locker, Cognito Pitman/Idler kit & Idler Pivot Kit, Fab Tech Tie Rods, True Tech Trailing Arms, Edelbrock Panhard Rod, PML rear Diff & Tranny Pans, Corsa Exhaust, Dynatech LT Headers, Diablo Predator Programmer, Volant CAI, Warn 9500 Winch, Escort 8500x50 & ZR3 Laser Shifter, Delta Light Bar, Rancho Steering Stabilizer & Bilstein Shocks, Ron Davis Radiator, PowerSlot Rotors, Hawk Brake Pads
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08-20-2012, 12:58 AM
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Hummer Expert
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Join Date: Feb 2008
Location: Portland, OR
Posts: 948
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Re: Dynatech Headers
That makes sense in H2s case, but mine are OBX headers and there is no plug installed or included. The hole isn't even threaded.
I was going to thread it and plug it, but it seemed the wall was too thin. Guess I could have tapped the hole in the flange.
I ended up getting a piece of steel. My kit came with a gasket.
__________________
_____________________________________
2006 HUMMER H2
MOOG Front End
Diablo InTune w/DiabLew Tune
Cognito Steering Support
OBX LT Headers
Air Raid Filter w/Tube
External Trans Cooler -Radiator Bypass
Corvette Servo
Rancho 9000 Adjustable Shocks-
Rancho Steering Stabilizer
20" Chrome Fuel Hostage - Cooper ST Maxx
Slotted Rotors/Ceramic pads/Steel Lines
Viper Smart Start
iPod/Video Interface
HID Head and Fog Lights
Optima Red Top w/ Priority Start Cut Off Mod
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08-20-2012, 06:13 AM
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Hummer Expert
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Join Date: Feb 2008
Location: Portland, OR
Posts: 948
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Re: Dynatech Headers
H2Much-- I'd still like to see what your driver side header looks like, when you have a moment. 
__________________
_____________________________________
2006 HUMMER H2
MOOG Front End
Diablo InTune w/DiabLew Tune
Cognito Steering Support
OBX LT Headers
Air Raid Filter w/Tube
External Trans Cooler -Radiator Bypass
Corvette Servo
Rancho 9000 Adjustable Shocks-
Rancho Steering Stabilizer
20" Chrome Fuel Hostage - Cooper ST Maxx
Slotted Rotors/Ceramic pads/Steel Lines
Viper Smart Start
iPod/Video Interface
HID Head and Fog Lights
Optima Red Top w/ Priority Start Cut Off Mod
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