Wilwood Superlite Internal Caliper - 3.5" Lug Mount - 1.75" Pistons, 1.10" Rotor Thickness Fuel Filter Housing They come with heavy-duty 3/4"

They come with heavy-duty 3/4" ball/roller bearing and a 1

grease resistant

180 lb/in Spring Rate

10-32 to 3/4 in Fasteners

FW XE266HR-12

Wilwood Superlite Internal Caliper - 3.5" Lug Mount - 1.75" Pistons, 1.10" Rotor Thickness Fuel Filter Housing They come with heavy-duty 3/4"The Superlite caliper series is the benchmark in short track, late model, modified and open wheel competition. It also enjoys prominence in a variety of road race, off road, rally and sport driving applications. The new FSLI model series is the latest innovation to this Superlite family of calipers. It has been redesigned with internal fluid ports that eliminate the external fluid cross over tubes, along with any potential problems that could arise