Cam Angle Sensor Disk for Nissan SR20DET RWD / KA24DE (50mm OD) - Use this disk if you have an EMS and need to run a different CAS. New Series 2 30-6610 and 30-6620 kits include this disk and do not require it to be purchased seperately. If you are buying your EMS second hand (used), or have a Series 1 EMS, you may need to buy this disk if you are having "sync" problems. 

This disk is a direct replacement for the factory Crank Angle Sesnor disk, and the center of the disk should look exactly like the stock one in your disctributor. Be sure to match the "hubs" of your CAS disk to ours before ordering. 

Note: Use coupon code "CAS" when checking out to have the CAS Disk sent via USPS to avoid a charge for shipping via FedEx or UPS (you can enter the coupon code when you enter your billing information). Depending on where you live, shipping via UPS or FedEx will cost you over $10. The good news about the coupon is you are saving at least $10, the bad news is it will take an extra couple days and there will be no tracking number.