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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!

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Old Fri, March 26th, 2021, 02:32 PM
syntaxterror syntaxterror is offline
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Default 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 09:06 AM. Reason: grammer
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