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hei upgrade worth it?
Hello looking to get a few more hp and/or mpgs out of my work truck. I know the two do not go together always but also know that to a certain point they can. I have a 1991 k2500 5,7 4l80e with 4.10 gears completely stock 132k I am going with ultimate tbi mods, hypertech hypercharger tbi...- NEHoss24
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- Replies: 28
- Forum: Engine Performance + Maintenance
