1972-89 Serpentine belt conversion w/crank trigger-Underdrive on 1974-89

Our serpentine belt conversion is the cure for broken, stretched  and tossed fan belts on the early Porsche 911 engines. This kit includes: crank pulley/trigger wheel, fan pulley, belt tensioner, belt, sensor mount and distributor hole plug. 

Note: This kit is an underdrive for years 1974-89. Stock ratio not available for 1974-83. See Item # 9110-06 for 1984-89 Stock ratio.

We recommend using- Crank pulley bolt #1107-10

* Sensor mount is for 1/2" crank sensor item # 72250 or Hall sensor # 75000
* Crank sensor is not included in this kit


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  • Model: 9110-05

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