Kourtney Kardashian is in leathered-out super fan mode for her husband Travis Barker‘s remarkable reunion performance with Blink-182 at Coachella.

Kourt and Travis got on the road Thursday to head to Indio, California for the huge Musical Festival weekend … and she made sure to flick it up and show support for her hubby ahead of his set.

While on the road, she posted a few photos from inside the trailer using the Coachella geotag, showing off her ‘fit and giving fans a sneak peek behind-the-scenes.

Of course, she couldn’t help but promote Poosh’s party, which is an ‘adult sleepaway camp’ held during the festival weekend.

Kourt’s looking like the ultimate rockstar groupie — shades paired with a graphic tee and black leather jacket.

Most importantly, she posted a shot of Trav’s practice drum kit, referencing the hot topic for all Blink fans — how’s he gonna play with his injured hand?!?

As we reported, Travis had surgery to repair his busted left ring finger a little over a month ago … and that forced the band to postpone dates on their first tour together in 9 years.

Everyone was shocked when the pop-punk rockers were a last-minute addition to Coachella’s Friday night lineup. As you can see, frontman Mark Hoppus is amped for their set inside the Sahara tent.

The band formed back in 1992 … and over 3 decades later, fans are still lining up to see ’em rock out.