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| Orion Reflash System for Navistar Power Hungry Performance is the first in the industry to provide custom tuning for the 1998 to 2007 Navistar Medium Duty platform! If you have any questions or would like more information on Orion, please post here. |
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#1
Fri, March 26th, 2021, 04:32 PM
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new tune
Finally put the 250 hp tune on the bus a couple weeks ago. Took it to go get fuel today and it was like night and day so much smoother. Normally I let it warm up for a few minutes and it smooths out but this time it sounded like it wanted to go from the start. I didn't go far about five miles but it had more pick up. I get about 9.5 mpg so when I take my next trip down south 225 mile I will check fuel mileage.
Last edited by syntaxterror; Mon, March 29th, 2021 at 11:06 AM. Reason: grammer 
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