Eliminate weak factory plastic idlers with the UPD M156 Billet Idler Set - a high-strength CNC aluminum upgrade built for smoother operation, extreme durability, and long-term AMG reliability.
Eliminate weak factory plastic idlers with the UPD M156 Billet Idler Set - a high-strength CNC aluminum upgrade built for smoother operation, extreme durability, and long-term AMG reliability.
Includes tensioner and pulley
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
This product was last offered at the strikethrough price on
08-27-2026
Upgraded Weistec Idler Pulley Kit
Custom Modified for Higher Belt Tension
Replacement Belt for Weistec Stage 1 & 2 M156 Supercharger Systems
Includes accessory belt, belt tensioner assembly and idler pulleys
10X Entries Into Our F80 M3 Sweepstakes
This product was last offered at the strikethrough price on
05-02-2026
Includes tensioner and pulley. OEM Supplier!
This product was last offered at the strikethrough price on
04-11-2026
The solution to a noisy, failing pulley
At Water Pump - Grooved - Also Used Between Refrigerant Compressor And Vibration Damper (Up To Engine 60057841)
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
This product was last offered at the strikethrough price on
08-13-2026
21.36x2360
We Price Match - Give Us A Call or Chat!
This product was last offered at the strikethrough price on
05-12-2026
21.36x2360
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
This product was last offered at the strikethrough price on
08-27-2026
Replacement Belt for Weistec Stage 3 M156 Supercharger Systems
Includes tensioner and pulley
We Price Match - Give Us A Call or Chat!
The solution to a noisy, failing pulley
At Water Pump - Smooth - Also Used Between Refrigerant Compressor And Vibration Damper (From Engine 60057842)
MSRP stands for Manufacturer's Suggested Retail Price. This is the suggested retail price provided by the manufacturer, supplier or seller.
This product was last offered at the strikethrough price on
08-27-2026
The solution to a noisy, failing pulley
We Price Match - Give Us A Call or Chat!
At Water Pump - Smooth - Also Used Between Refrigerant Compressor And Vibration Damper (From Engine 60057842)
This product was last offered at the strikethrough price on
05-09-2026
21.36x2360
This product was last offered at the strikethrough price on
05-07-2026
All Weistec idler pulleys run this same high quality bearing.