| 06’ 9900i with a CM870 ISX tune options |
| 04-16-2021, (Subject: 06’ 9900i with a CM870 ISX tune options ) Post: #1 | |||
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| 06’ 9900i with a CM870 ISX tune options I’m trying to find who would be able to provide the best tune for better fuel efficiency on my 06’ 9900I. It has a 565hp cm870 isx with 3.55 rears and a 13 speed manual. I’m averaging 5.4-5.5. I usually am 78k-80k at all times. I know it’s not the most aerodynamic truck but would love to have a proper tune put to and hopefully get closer to 6mpg. I’m located by Birmingham, al. | |||
| 04-16-2021, (Subject: 06’ 9900i with a CM870 ISX tune options ) Post: #2 | |||
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| RE: 06’ 9900i with a CM870 ISX tune options maybe try forum member running rough. User's Signature: ->: What I post is just my own thoughts and Opinions! --- I AM Full Of S__T!. | |||
| 04-16-2021, (Subject: 06’ 9900i with a CM870 ISX tune options ) Post: #3 | |||
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| RE: 06’ 9900i with a CM870 ISX tune options Will do. Thanks | |||
| 04-16-2021, (Subject: 06’ 9900i with a CM870 ISX tune options ) Post: #4 | |||
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| RE: 06’ 9900i with a CM870 ISX tune options | |||
| 04-16-2021, (Subject: 06’ 9900i with a CM870 ISX tune options ) Post: #5 | |||
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| RE: 06’ 9900i with a CM870 ISX tune options | |||
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