I wouldn't even call Z26 a performance option: they overheat and wear out way too fast. They are fine for hooning on the street and canyon carving, but you are likely to find them overheating fast on a race course.
For the single-piston brakes LS and LT models carry, I only found 2 performance brake pad options:
1) Dynamic Friction "Street/Track" pads
Front:
https://www.rockauto.com/en/moreinfo...413&cc=3437525 ; hardware:
https://www.rockauto.com/en/moreinfo...11910481&jsn=4
Rear:
https://www.rockauto.com/en/moreinfo...433&cc=3437525 ; hardware:
https://www.rockauto.com/en/moreinfo...11910729&jsn=1
Before I put them onto my V6 1LS, I didn't know anything about the pads other than that they're manufactured by a company that suppliers the brakes to R1Concepts, so I went in blindly.
To my surprise, they held up very well at Buttonwillow Raceway--I only experienced slight, but negligible fade after doing 5 hot laps in a row.
They are also fine for daily driving, but note that they will dust like a mothertrucker.
2) Carbotech AX-6 brake pads:
https://ctbrakes.com
Never tried them and I don't think they would be good as a dual-purpose street/track pads, but a lot of Camaro guys like them + they make it in your size:
Front: CT1886-AX6
Rear : CT1914-AX6