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Old 08-18-2019, 10:15 AM   #1
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Default 8.1 and Allison Truck

I have been reading on this site about tuning and upgrades to the 8.1 and Allison pickup trucks to improve towing mileage. Who have you guys been using for tuning; what brand or parts have you used, intake, exhaust ect...
Any help on this would be appreciated. Thanks
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