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07-10-2007, 04:00 AM
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Hummer Veteran
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Join Date: May 2006
Location: Ontario, Canada
Posts: 91
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Dynatec long tube headers
Do these headers install with no problems to the factory exhaust? I have leaks at my stock manifolds at the block, torqued to spec but still leaking, could the manifold be warped, is this common? Looking for a solution, can't stand the ticking noise any longer.
Thanks
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07-10-2007, 04:23 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: Dynatec long tube headers
Not sure, but I have factory take off exhaust. If interested, PM me...
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07-10-2007, 10:36 PM
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Hummer Expert
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Join Date: May 2007
Location: PHOENIX AZ
Posts: 681
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Re: Dynatec long tube headers
I had Dynatec longtube's on my 2000 Z28 and they had nice thick flanges and never leaked. what I had was a problem with driveways they hung kinda low and the car was only lowered an inch and a half, I don't see that being a problem in an H2. the Dynatec headers were a top quality header and flowed like a MoFo. the engine was a 382 stroker and extensivley modifyed ,how they work on a stock motor I can't say .for a heavy truck I would want a header that would boost low end torque . good luck and get them cermic coated ,you will be glad you did in the long run . 
__________________
A government big enough to
give you everything you want, is
strong enough to take everything
you have.
-- Thomas Jefferson
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07-11-2007, 12:34 AM
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Hummer Veteran
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Join Date: Nov 2006
Location: Louisiana / DFW
Posts: 80
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Re: Dynatec long tube headers
installed easy enough, some of the hardware on the flanges have a tendancy to back off and leak and rattle. I guess you could replace the nuts with some lockers, or have it welded up.
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07-11-2007, 08:12 AM
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Hummer Authority
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Join Date: Nov 2004
Location: Little Rock, Arkansas
Posts: 1,784
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Re: Dynatec long tube headers
I have complete Dynatec header catback system since 2005 and have had no trouble.
I like them allot.
TAZ
__________________
05 H2 SUV cus. paint, Magnuson SC 6/12lb boost, cowl hood scoop, 12" dash touchscreen, GM elec. fans, HPTuners.com tuning soft., Dynatech headers dual catback exhaust Jet Hot chrome front to back Flowmaster Super 40's, Diamo 8 Karat rims & 325X60-20" Toyo, 4 OEM Captain seats Katzkins leather, rear console computer inside running all AV/NAV etc., Infinity component system 3 amps Tsunami Caps, rear flip down 12" monitor, headrest monitors, overhead console boost, fuel pressure, & A/F ratio gauges
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07-12-2007, 05:47 PM
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Hummer Veteran
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Join Date: May 2006
Location: Ontario, Canada
Posts: 91
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Re: Dynatec long tube headers
Thanks guys, any where you would recommend purchasing these from?
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