S&B Intake box cover

[Nuke]

I'm curious if anyone is running their intake with the cover off and have noticed any improvement: fuel economy and/or performance?

I never noticed any fuel mileage improvement despite my likely anal hand calculated mileage at every fill-up and modest driving style. I'm also disappointed in my '19 ORPS WOT top end performance (compared to my '08 Sport) and wondered if it could be air starvation?

 

[Whippersnapper02]

You'd be pulling hot engine day heat in without the cover. In theory the ECU would reduce the amount of fuel it commands for since hot air is less dense but I don't see it changing MPGs.

From what I remember in my 2010 Tacoma, top end performance is better with this dual VVT-i engine. The restriction is in the heads, these just aren't performance engines.

 

[Space King]

If there was anything to be gained from removing the cover of the S&B Intake... they'd be selling an overpriced "Upgrade Kit" that consisted of nothing but cheap tools for prying it off.