Well i researched around and most people drill their gen4 block and put on the ls1 gen3 knock sensors back.. But i was seeing an adapter harness made by racetronix which has the gen4 pigtails which are 2 wires each and one of the wires becomes a ground and the others to the connector to the gen3 harness.. Will these work?



By the way i have the gen4 knock sensors already..

 

anyone?