MSD
MSD 8491 | Tachometer Adapter
The standard tach drive for MSD tach drive distributors is a 3/16 inch tang drive cable. In most cases this type of drive will work, but for those who require the 0.104 inch square drive (Corvette...
In some instances when you install an MSD ignition, the factory ECU may not be able to distinguish when the coil fires. This is the signal that is also responsible for firing the injectors (or the tachometer), which may cause a no-run situation. The dual channel ignition adapter simulates the original coil trigger signal thus allowing the ECU to properly trigger both the tach and fuel injection with the MSD DIS ignition installed. In most cases, the adapter plugs directly into the MSD's harness. For vehicles using an MSD DIS-2 ignition, only one PN 8912 is required. For DIS-4 applications, two PN 8912's are required.
WARNING CA Proposition 65 | Yes |
WARNING CA Proposition 65 Message | WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov |
This product can expose you to chemicals, including WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov which is known to the State of California to cause cancer or birth defects or other reproductive harm. For more information, go to www.P65Warnings.ca.gov.