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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2002 - 2009 TrailBlazer/Envoy Tech > 02-09 Vortec 4.2L I-6 Engine and Drivetrain > Exhaust Mods

Exhaust Mods Performance Exhaust Modifications

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  #101  
Old 01-24-2013, 06:07 PM
palitoiii's Avatar
palitoiii palitoiii is offline
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2004 Chevy Trailblazer SSi
Indigo Blue Metallic 4.2L I6 4X4
Join Date: Feb 2006
Location: Bay Shore, NY
Posts: 288
Thats pretty good #'s. Marshall how was the check engine? With just the headers did it have the check engine light on? And if it did with your tune does it fix that? I dont want to have inpection problems here in NY.
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  #102  
Old 01-24-2013, 08:03 PM
blown4pt3 blown4pt3 is offline
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2003 Chevy TrailBlazer LS
Onyx Black 4.2L I6 4X4
Join Date: Nov 2007
Location: Southwest MI
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Very nice increase! Well done Kooks!

novajoe, you probably have mentioned what you have done before, but could you recap any and all mods you have on the truck as it sits now? It would be nice to reference what you have on the truck in a post close to the dyno chart so people don't spend much time looking for the info.

Thanks!

And again, well done Kooks!
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  #103  
Old 01-24-2013, 10:29 PM
limequat limequat is offline
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1987 Non-GMT360 Other
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Is the smoothing value the same for all three runs?
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  #104  
Old 01-24-2013, 11:29 PM
novajoe novajoe is offline
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2004 Chevy TrailBlazer LT
Pewter Metallic 4.2L I6 4X4
Join Date: Mar 2010
Location: Statesville, NC
Posts: 43
I would like to thank everyone who has helped out with this project. This would include the staff at Kooks and PCM of NC. I got the truck back from Kooks Tuesday night and you could tell right away that the motor was breathing better. If you floored it it came to life and had no hesitation, and the sound real didn't change that much (a little deeper). The first day it took a little bit for the computer to learn the headers but after 100 miles it was getting happy. Then this morning I dropped it off at PCM of NC and they worked their magic. The numbers are great but the seat of the pants meter put a smile on my face. I now have just over 250 miles on the new headers and even with being aggressive and having some fun (higher than normal rear tread wear) I still average 16.9 MPG. I expect it to be much higher once I return to normal driving and repeat a couple month average. I will say that this system is worth the investment. You will never have a cracked manifold, better looks and performance too. I anyone in the Charlotte area want to see it in person please let me know.

I will also be adding the E-fan setup from PCM of NC in the near future ( I got a look at it today and I think it would be a shame not to add it to the mods on the TB)
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  #105  
Old 01-24-2013, 11:35 PM
novajoe novajoe is offline
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2004 Chevy TrailBlazer LT
Pewter Metallic 4.2L I6 4X4
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Location: Statesville, NC
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Quote:
Originally Posted by palitoiii View Post
Thats pretty good #'s. Marshall how was the check engine? With just the headers did it have the check engine light on? And if it did with your tune does it fix that? I dont want to have inpection problems here in NY.
After the tune there is no light and I asked about inspections as we have testing here in NC and i was told that after the relearn it will pass.


Quote:
Originally Posted by blown4pt3 View Post
novajoe, you probably have mentioned what you have done before, but could you recap any and all mods you have on the truck as it sits now? It would be nice to reference what you have on the truck in a post close to the dyno chart so people don't spend much time looking for the info.

Thanks!

And again, well done Kooks!

The mods list is very simple. NONE! This trail blazer was bone stock. This was the first mod. This is my wifes daily driver, but I can tell you after she drove it with the headers she now has the mod bug. I now have a to do list for her truck! LOL
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  #106  
Old 01-25-2013, 10:54 AM
marshall@pcmofnc marshall@pcmofnc is offline
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2006 Chevy TBSS
White 6.0L LS2 V8 2WD
Join Date: Mar 2008
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Quote:
Originally Posted by limequat View Post
Is the smoothing value the same for all three runs?
As far as I know. Can you even select different smoothing for separate dyno runs??
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  #107  
Old 01-25-2013, 05:44 PM
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XUVFISCH XUVFISCH is offline
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2004 GMC Envoy SLE XUV
Magnetic Red Metallic 4.2L I6 4X4
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Location: Michigan
Posts: 54
So is the system your selling going to replace my original Catalytic converter also? or do I still need a new catalytic converter since I believe mine is plugged.

I called and was quoted a price of $700 and guarenteed 20+ hp gain without retune. Will the price remain the same with only a 10 HP gain without retune.


Quote:
Originally Posted by Kooks Headers View Post
System is complete Joe's truck was running today.

Drew Amitrano
Sales & Tech Representative
Kook's Custom Headers
141 Advantage Place
Statesville, NC 28677
Phone - (704) 768-2288 x218
Fax - (704) 768-2266
Email - drew@kookscustomheaders.com
Web - www.kookscustomheaders.com
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  #108  
Old 01-25-2013, 10:18 PM
efi-diy efi-diy is offline
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1951 GMC 3100 PU Truck
hot rod black turbo'ed 4.2L I6 2WD
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Quote:
Originally Posted by XUVFISCH View Post
So is the system your selling going to replace my original Catalytic converter also? or do I still need a new catalytic converter since I believe mine is plugged.

I called and was quoted a price of $700 and guarenteed 20+ hp gain without retune. Will the price remain the same with only a 10 HP gain without retune.
Dude go look at the pictures, your answer is there..

Why would you think the price of the part would change with HP change? The tune is completely separate from the exhaust changes.. The cost to make it does not change ..
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  #109  
Old 01-25-2013, 10:37 PM
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XUVFISCH XUVFISCH is offline
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2004 GMC Envoy SLE XUV
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Thanks, But I was hoping Drew would answer my questions since he is selling it.... also would it be the same fit for the XUV model?
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  #110  
Old 01-26-2013, 12:16 PM
53-210 53-210 is offline
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2007 Chevy Other
custom 4.2L I6 2WD
Join Date: Jan 2013
Location: eldridge, ia
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I noted the tune lowered TQ with headers. Could this be changed to maintain the lower TQ?
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