OptiTorque Harmonic Balancer Bolt - GM Duramax 19-221 Racepak The Racepak AF-1 is

Racepak The Racepak AF-1 is a single channel air/fuel sensor package designed to be utilized with any of Racepak's V-Net (can bus) series of data loggers

exclusive longer-than-standard nut-starter

mounting Hardware & instructions

External Headset Antenna Adapter Kit with UHF Antenna

OptiTorque Harmonic Balancer Bolt - GM Duramax 19-221 Racepak The Racepak AF-1 isProduct Description: Harmonic Balancer Bolt 18 mm x 1. 50 Thread 2. 75 in Long 36 mm 12 point Head Steel Black Oxide GM Duramax Sold Individually OptiTorque produces premium quality fasteners for a wide range of automotive applications. From stock rebuilds to hard core racing builds, OptiTorque fasteners are USA made and designed, featuring premium materials and designed to meet or exceed OEM specs.