Center case section is a heat sink

designed for the Inferno ST-R

Adjustable Timing: 0 to 20 degree timing adjustments for expert level tuning and increased performance

and race-day use

(1) Aluminum Solid Axle

Associated ASC92357 RC10B74 HD Differential Outdrives O Figuers Center case section is aAssociated ASC92357 RC10B74 HD Differential Outdrives The Associated ASC92357 HD Differential Outdrives are genuine heavy duty replacement parts designed for the RC10B74. They transfer power from the differential gears to the driveshafts. Built from heavy duty material for increased strength, these outdrives are a direct fit replacement that improves durability over the stock parts on your B74. Genuine Associated part, number ASC92357 Heavy duty