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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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  #1  
Old 01-07-2013, 11:23 PM
BlueTB_Feller BlueTB_Feller is offline
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2002 Chevy TrailBlazer LT
Midnight Blue Metallic 4.2L I6 4X4
Join Date: Jan 2013
Location: El Monte, CA
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exhaust opinion

exhaust opinion:
I am currently looking to buy an exhaust kit but cannot decide between: Magnaflow and Borla. I currently have a Flowmaster 50 series but I am no longer happy with the performance or in cabin noise.
Any insight would be greatly appreciated.
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  #2  
Old 03-02-2013, 04:17 AM
Dmanns67's Avatar
Dmanns67 Dmanns67 is offline
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2007 Chevy TrailBlazer LT
Desert Metallic 4.2L I6 4X4
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The problem I have found with the 4.2L TB is that there are not that many options out there for exhaust systems. I believe the Borla and Magnaflow are dual exhaust systems. Gibson makes a nice side exit exhaust, single pipe, which is relatively low cost ($275-$300) depending on which site you look at. I personally like the single pipe rear exit exhaust which is why I have been holding off on the exhaust mod because if I buy the Gibson then I will have to mod it to be a rear exit. I was contemplating on swapping out the stock muffler with a flowmaster. It all depends what look you are going for and how big your wallet is.
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Old 03-31-2013, 08:58 AM
supermanfish supermanfish is offline
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2004 GMC Envoy SLE
Sand Beige Metallic 4.2L I6 4X4
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I have a flowmaster 50 SUV w/o a resonator and the drone is way to loud. I will be changing mine to a magnaflow soon I think.. It's the only one i've seen people say inst bad.
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Old 03-31-2013, 10:54 AM
DomSanto DomSanto is offline
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Trailblazer Chevy TrailBlazer LT EXT
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i have the magnaflow the sound is nice but cabin noise is starting to get to me lol
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Old 03-31-2013, 11:09 AM
supermanfish supermanfish is offline
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2004 GMC Envoy SLE
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What magnaflow do you have? I was going to replace my FM 50 series with the 28" magnaflow to reduce cabin drone.. If yours is getting drone with that muffler I may need to go a different route.
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Old 03-31-2013, 11:24 AM
DomSanto DomSanto is offline
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here is the exact one i have

http://www.magnaflow.com/02product/s...ayproducts.asp
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Old 03-31-2013, 11:28 AM
supermanfish supermanfish is offline
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2004 GMC Envoy SLE
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Hrm that link isn't working for me
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Old 03-31-2013, 11:39 AM
DomSanto DomSanto is offline
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if you go on the magnaflow website and search the exhuasts for the 2004 chevy trailblazer there is only one option and thats what i got. i replaced from the cat back. it looks really nice and sounds cool but , after a couple months of driving i realized how loud is actually is inside the cabin.
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