DSX Tuning pulleys are the "go to" upgrade pulley for your LT4 or LSA platform.

These lower pulleys are compatible with ATI part numbers 918854 and 918856 for the LSA and LT4 (Camaro/CTS-V only) damper. They are machined from 6061 aluminum, anodized for protection and have the diameter laser etched on the face.

The pulleys are available in three sizes:

• 230mm (9.06") [LSA 15%/LT4 12%]
• 235mm (9.25") [LSA 18%/LT4 15%] IDLER RELO BRACKET REQUIRED FOR LSA
• 240mm (9.45") [LSA 20%/LT4 17%] IDLER RELO BRACKET REQUIRED FOR LSA
• 245mm (9.65") [LSA 23%/LT4 20%] IDLER RELO BRACKET REQUIRED FOR LSA
• 250mm (9.84") [LSA 25%/LT4 22%] IDLER RELO BRACKET REQUIRED FOR LSA

Note the 9.84 can interfere with the sway bar on extreme suspension geometry events in LT4 ZL1s/CTS-Vs.