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Discussion Starter #1
as the title says, im hoping a few people would have a 4.3l EFI tune they would like to share. the shop i go through has a lot of of tunes for 4.8+ but this is the first 4.3 hes done. hoping to get a few tunes from people and then maybe take what we want out of them.

mods to truck:
trimmed butterfly
k&n filter
modded air box
electric injectors
shortened exhaust with flow master
 
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