AEM 30-8760 CAS Trigger Disk 24+1 Tooth 50mm Nissan SR20DET RWD / KA24DE

Vehicle Fitment

• Nissan Silvia S13 / 180SX - SR20DET (RWD)
• Nissan Silvia S14 / 200SX - SR20DET (RWD)
• Nissan Silvia S15 Spec R - SR20DET (RWD)
• Nissan 240SX S13 - KA24DE
• Nissan 240SX S14 - KA24DE
• Nissan Altima U13 - KA24DE
• Nissan Bluebird U13 - SR20DET
• Nissan Skyline R34 GTT - RB25DET NEO (and many other R34 RB-series engines)
• Broader RWD SR20DE and SR20DET applications - confirm hub match before ordering

Fitment Notes

• Critical hub verification required before ordering. The 30-8760 uses a "D" shaped shaft hub and a 50mm outer diameter. Before purchasing, remove the factory CAS disc from your distributor and visually confirm that the center hub profile of your stock disc exactly matches the AEM disc. If your stock disc has a round shaft (not "D" shaped), you need the 30-8761 instead. If your application is a FWD or AWD SR20 (e.g., Pulsar GTI-R), you need the 30-8762 (54mm, D shaft).
• For use with AEM programmable engine management systems (EMS) only. This disc is a component for AEM EMS installations - it is not a standalone ignition upgrade and does not function without an AEM EMS or compatible aftermarket ECU configured for a 24+1 cam trigger pattern.
• AEM Series 2 EMS kits include this disc and do not require it to be purchased separately. If you are running a Series 1 AEM EMS, or have acquired a second-hand AEM EMS and are experiencing cam sync issues, this disc is the correct replacement.
• Related AEM CAS disc variants: 30-8761 (50mm OD, round shaft - most RB25DETT, RB26DETT, VG-series engines); 30-8762 (54mm OD, D shaft - FWD/AWD SR20DET, Pulsar GTI-R).
• Sold individually - one disc per package.

Features

• 24+1 Tooth Pattern - Eliminates CAS Sync Issues: The 30-8760 uses a 24-tooth evenly spaced pattern plus one additional sync/reference tooth - the 24+1 trigger pattern. This pattern resolves the cam angle synchronization problems that commonly arise when running an AEM EMS on factory Nissan SR20DET (RWD) and KA24DE distributor setups, ensuring accurate sequential injection timing and ignition advance at all RPMs.
• Direct Replacement for the Factory CAS Disc: The AEM disc installs directly in place of the factory Crank Angle Sensor disc inside the existing Nissan distributor - no distributor replacement, external trigger kit, or fabrication required. The factory CAS pickup sensor and distributor housing are retained.
• 50mm Outer Diameter - Factory Spec Dimensions: Machined to 50mm OD, matching the factory disc dimensions for correct clearance and sensor gap inside the factory Nissan distributor housing on SR20DET RWD and KA24DE applications.
• "D" Shaft Hub - Positive Drive Engagement: The D-profile shaft hub provides positive rotational engagement with the distributor drive shaft - preventing slippage or disc rotation relative to the shaft that could cause timing errors. This hub type is correct for most RWD SR20 variants and many R34 RB engines.
• Compatible with Multiple Aftermarket ECU Platforms: While designed for AEM EMS systems, the 24+1 pattern is a recognized trigger standard. Compatible with other aftermarket ECU platforms (Haltech, Link, MoTeC, MaxxECU, and others) that support a 24+1 or 24-tooth with 1 sync cam trigger configuration - always verify trigger settings with your specific ECU's documentation or tuner.

Specifications

• Part Number: 30-8760
• Brand: AEM Electronics (AEM Performance Electronics)
• Product: Nissan CAS Trigger Disk - 50mm OD, D-Shaft Hub
• Trigger Pattern: 24+1 (24 evenly spaced teeth + 1 sync/reference tooth)
• Outer Diameter (OD): 50mm
• Hub Type: "D" shaped shaft
• Primary Application: Nissan SR20DET (RWD), KA24DE
• Quantity: 1 (sold individually)
• Warranty: 12 Months

Included Components

• 1x AEM CAS Trigger Disk (30-8760) - 50mm OD, D-shaft hub, 24+1 tooth pattern

Product Description

The AEM 30-8760 is a 24+1 tooth CAS (Crank Angle Sensor) trigger disk for Nissan SR20DET RWD and KA24DE engine applications. It is a direct internal replacement for the factory CAS disc inside the Nissan distributor - designed for use with AEM programmable engine management systems to resolve cam angle sync issues that arise when running an AEM EMS on stock Nissan distributor hardware.

The disc installs into the existing factory distributor without modification, replacing the OEM trigger disc with a 24+1 pattern disc that the AEM EMS (and other aftermarket ECUs supporting 24+1 cam triggers) can accurately read for sequential fuel injection timing and precise ignition control at all RPMs. It is machined to 50mm OD with a "D" shaped shaft hub - the correct profile for most RWD SR20DET variants (S13, S14, S15 Silvia/180SX), KA24DE applications (240SX S13/S14, Altima U13), and many Skyline R34 RB-engine distributors.

Before ordering: remove the factory CAS disc and confirm the hub shape and OD match the AEM disc exactly. D-shaft, 50mm = 30-8760. Round shaft, 50mm (most RB25/RB26/VG) = 30-8761. D-shaft, 54mm (FWD/AWD SR20, Pulsar GTI-R) = 30-8762. AEM Series 2 EMS kits include this disc. 12-month warranty.