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Go Back   Chevy TrailBlazer, TrailBlazer SS and GMC Envoy Forum > 2006 - 2009 TrailBlazer SS Tech > 06-09 SS Engine and Drivetrain > Exhaust Mods

Exhaust Mods Performance Exhaust Modifications

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  #1  
Old 02-01-2008, 02:52 PM
BLU98 BLU98 is offline
 
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Stock exhaust size?

What's the size of the pipe before and after the muffler? Is it 3 inch in and out or 2.5. in out?
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  #2  
Old 02-02-2008, 01:46 AM
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JCattSS JCattSS is offline
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2006 Chevy TrailBlazer SS
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3 in 2 3/4 out.
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12.59 @ 107 1.73 60
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Old 03-04-2008, 10:33 PM
BLU98 BLU98 is offline
 
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The tail pies 2.5 as well?
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Old 03-04-2008, 10:34 PM
BLU98 BLU98 is offline
 
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Sorry 2.75?
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Old 03-04-2008, 11:55 PM
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2006 Chevy TrailBlazer SS
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Its been a while since I cut and measured but pretty sure everything after the muffler was 2.75.
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Old 03-05-2008, 07:08 PM
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87octane 87octane is offline
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2006 Chevy TrailBlazer SS
Silverstone Metallic 6.0L LS2 V8 AWD
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backpressure measurement results: OEM catback

Test platform: 2006 AWD 32k miles
Relevant mods: SW LT's and SW catted Y pipe into stock catback
CAI and ported intake manifold, custom tune
Relevant stock parts: stock heads, stock cam, stock muffler, stock over axle pipe, and stock resonator & tip.

PSI test probe in front of stock muffler.

WOT Results: 0 PSI below 3500
1/2 PSI 3500-4000
1 PSI from 4000-4500
1.5 PSI at 5000
max reading 1.6 PSI around 6000
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