Dynatech SuperMAXX headers - How do you like them?
Racer
Joined: Jul 2000
Posts: 404
Likes: 0
From: Napa
Love mine too! Had them installed ~2weeks ago, no rattles or bangs from clearance issues. I finally got under the car to check out the install, and they look great, the best set of headers I've ever owned! You do hear the typical tinny sound that all headers make, but wow does this thing come alive with the go pedal 
Bob
Bob
Race Director
Joined: Jun 2004
Posts: 19,459
Likes: 48
From: Schaumburg IL
CI 7-8-9-11 Veteran
St. Jude Donor '06-'10, '13
Very happy with mine, have had them on a few months now. Definitley can feel more torque and a lot louder 
2 things to be aware of.
Be sure you hook up your O2 sensors correctly, it's easy to cross them up, many have done this
You will most likely through a cat-efficiency code with highflow cats hooked up to stock 02's..this won't effect performance but will effect you passing emissions in some states.. it's due to the fact that the highflow cats do not heat up quick enough. The directions that come with the kit talk about this..you can either order O2 sims or get an LS1 edit/tune and the code will go away.
sorry for the long post, just want to share as much info as possible.
2 things to be aware of.
Be sure you hook up your O2 sensors correctly, it's easy to cross them up, many have done this
You will most likely through a cat-efficiency code with highflow cats hooked up to stock 02's..this won't effect performance but will effect you passing emissions in some states.. it's due to the fact that the highflow cats do not heat up quick enough. The directions that come with the kit talk about this..you can either order O2 sims or get an LS1 edit/tune and the code will go away.
sorry for the long post, just want to share as much info as possible.
Supporting Tuner
Joined: Sep 2004
Posts: 51,896
Likes: 39
From: ================== Houston, Texas www.englandgreen.com ================== Necessary Evil™ __________
CI 6-7-8-9-10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
I had the codes all the time until I had the rear O2 sensors deleted in the tune.
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
I just placed this post in my "favorites". I have been looking for a mod to do during the winter.
How many of you reporting HP/torque/SOTP increases have -mostly- stock motors?
How many of you reporting HP/torque/SOTP increases have -mostly- stock motors?
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Le Mans Master
Joined: Oct 2003
Posts: 6,126
Likes: 19
From: Streamwood illinois
I went from 12.297@111.05 (112.50 was high mph that day) 1.788 60' in -500' DA. I added nothing but the LTs and leaned it out some and ran 12.119@114.81 (115.06 was the high mph that day) 1.749 60' in +700' DA. As you can see i gained quite a bit, but as a note, i gained NOTHING prior to leaning it out. Also note DA played a role here. It was running around 11.2-11.5 AFR at WOT in higher RPMS after the swap.
Pro
Joined: Jun 2003
Posts: 702
Likes: 0
From: Castle Rock Co
Originally Posted by Mike Mercury
I just placed this post in my "favorites". I have been looking for a mod to do during the winter.
How many of you reporting HP/torque/SOTP increases have -mostly- stock motors?
How many of you reporting HP/torque/SOTP increases have -mostly- stock motors?
Motor is a stock 99 with blackwing and 01 up style MAFS, basic LS1 edit tuning.
Supporting Tuner
Joined: Sep 2004
Posts: 51,896
Likes: 39
From: ================== Houston, Texas www.englandgreen.com ================== Necessary Evil™ __________
CI 6-7-8-9-10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
Originally Posted by Mike Mercury
I just placed this post in my "favorites". I have been looking for a mod to do during the winter.
How many of you reporting HP/torque/SOTP increases have -mostly- stock motors?
How many of you reporting HP/torque/SOTP increases have -mostly- stock motors?
Definitely an instant and big SOTP increase.
EG
Pro
Joined: Jun 2003
Posts: 702
Likes: 0
From: Castle Rock Co
Originally Posted by connecticut
i've installed 3 dt systems, they go in w/ no prob, but don't look as kool as the kooks or lg's
Don't look as cool?
Thats a subjective opinion. To me the DTs look as good as the LGs and far better than the kooks.
Burnout
Joined: Jan 2004
Posts: 1,437
Likes: 12
From: South Surrey (White Rock) British Columbia
Originally Posted by BadAV
So what's the verdict on the O2 codes? How many are getting this code and how many aren't?
jmho
mrgil
Safety Car
Joined: Jun 2004
Posts: 4,957
Likes: 527
From: Witness Protection Program Somewhere, USA
Have the entire system in for a couple of weeks now and installed all the original O2's back in and no codes so far. Keep watching for them but so far so good. Maybe has something to do with having them coated(keeps more heat inside the system). Did not coat the cats though since not recommended by the coater due to fine mesh inside.
Keep watching for them but so far so good. Maybe has something to do with having them coated(keeps more heat inside the system). Did not coat the cats though since not recommended by the coater due to fine mesh inside.
Team Owner
Joined: Apr 2001
Posts: 54,204
Likes: 180
From: S.W. Ohio. . . . . . NRA Life Member
Originally Posted by EnglandGreen
Tire ripping with an A4 and TALL 2.73:1 gears (just a Blackwing and Stingers at the time)
Definitely an instant and big SOTP increase.
EG
Definitely an instant and big SOTP increase.
EG
Hell; I'm sold. !!!
Supporting Tuner
Joined: Sep 2004
Posts: 51,896
Likes: 39
From: ================== Houston, Texas www.englandgreen.com ================== Necessary Evil™ __________
CI 6-7-8-9-10 Veteran
St. Jude Donor '05-'06-'07-'08-'09-'10-'11-'12-'13-'14
Originally Posted by Mike Mercury
tire ripping ????
Hell; I'm sold. !!!
Hell; I'm sold. !!!
with just the mods listed above and a Predator tune. Car could NEVER do that before - it would just bog. Plus the sound of the headers are music to mine ears EG
Pro
Joined: Nov 2002
Posts: 722
Likes: 0
From: ********************* Florida's Space Coast *********************
I have had my set for 10+ months and love them. No clue on how good the Cats work as I had the rear O2 sensor programmed out at the time of my tune. My car picked up 40 RWHP with this system, Vararam, BBK TB and the tune by Mike Norris (NLP). Also zero ground clearence problems. These are close to the LGM system (which is VERY NICE) but the price on the SuperMaxx kicked A$$! The savings paid for my tune!!!!
I am a believer...
I am a believer...
