Knock Sensor kit for 911 w/Bosch KS-4 sensors

Kit includes:

2x 993 OEM knock brackets/bars

2x Bosch KS4-P knock sensors

2x mating connector kits with terminals and seals for the knock sensors

Drilling the heads is required to mount the sound bar to engines earlier than 964/993 3.6Ls. Knock sensor kit can be mounted on an assembled engine using an angle drill for the mounting holes in the heads.

The KS-4 is a wideband knock sensor of OEM quality, detecting a frequency range from 3 to 25 kHz. It is commonly used with standalone ECUs for knock detection and control.