Chevy/GMC 6.2L and 6.5L Discussion of Chevy and GMC Trucks with 6.2L and 6.5L Diesel Engines

4" exhaust: put it on, got some questions

  #1  
Old 06-21-2011 | 11:35 AM
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Default 4" exhaust: put it on, got some questions

hi, i just put a 4" on my 6.5 from the downpipe back and i was wondering if anyone else had done this and had any positive or negative outcomes.

let me know please!!
 
  #2  
Old 06-21-2011 | 05:40 PM
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i liked the sound!
 
  #3  
Old 06-21-2011 | 09:37 PM
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did you have any fuel economy issues?
 
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Old 06-21-2011 | 10:21 PM
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the one ? ask you did you replace down pipe
 
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Old 06-22-2011 | 10:27 AM
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good outcome, a bit droney at certain rpm and load but thats what you get with a stright pipe i guess, about 100km per tank more on highway.

---AutoMerged DoublePost---

or thats what it seemed like, it was noticeable though
 

Last edited by wpg6.5; 06-22-2011 at 10:27 AM. Reason: Automerged Doublepost
  #6  
Old 06-22-2011 | 12:57 PM
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Originally Posted by Crazy
the one ? ask you did you replace down pipe

i didnt replace the down pipe. i just wanted to know if anyone got better or worse milage with it
 
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Old 06-22-2011 | 04:57 PM
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i got worse at first because i loved listening to it but my after i got used to it my mileage did improve a little bit
 
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Old 06-22-2011 | 10:11 PM
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i seen better fuel mileage out it but most of you young guys see less at first cause you get your foot into it but you will see diff in horse power boost and lower EGT temps

---AutoMerged DoublePost---

but i would go with 3" dp then stock and go with 2.75 cross over pipe
 

Last edited by Crazy; 06-22-2011 at 10:11 PM. Reason: Automerged Doublepost
  #9  
Old 06-23-2011 | 12:28 AM
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if you dont have the money for a whole exhaust system get the downpipe first because that is the major problem on these trucks. you should see how smashed they get from the factory!
 
  #10  
Old 06-23-2011 | 10:14 PM
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ok thanks guys i appreciate it
 

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