Might help

[wireman]

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[sennaspirit]

I watched this vid last night! Seems the exhaust upgrade and the performance tuning are the only serious positive upgrades, the rest are apparently rip offs with no benefits.

 

[VinnyLongPour]

Dude’s voice gets to be a little much but good testing and empirically proves what we know - the gimmicky crap doesn’t work. How much an exhaust and a tune will help depends on the vehicle too….

 

[OBSASQ]

If they really saved gas the manufacturers would use them to meet CAFE requirements.

But they probably work great on EVs.

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