it doesn’t need to be tuned, but it should be tuned any time you have a less restriction to the MAS/Maf in this case the oval and TB. doens’t need it i say because my 99 had full exhaust with a lid and ported maf and it hauled the mail pretty well. could’ve done better with tuning. i’d say rock a tune out on it it will extract maybe 15-20 hp at most but it will broaden the powerband by that much more.