When it comes to late model performance parts, nothing beats bolt-on and direct connection components. These new bolt-in coils are designed with improved materials and windings to produce a stronger output. GM single connector coil PN 8231. Used on 1996 to 1999 General Motors vehicles. Installation tip: if you plan to install an MSD Ignition with this coil, use a PN 8877 harness for a direct plug-in installation. Direct performance replacement coil for GM 1996-1999 80:1 turns ratio Lower Primary Resistance Produces High Voltage Output Works w/Stock Ignition As Well As MSD Ignitions CARB E.O. Approved Additional Attributes: GTIN: 00085132082315 Inductance: 3.9 mH Maximum Voltage: 40000 Peak Current: N/A Primary Resistance: .500 ohms Secondary Resistance: 6.5K ohms Spark Duration: N/A Turns Ratio: 80:1 WARNING CA Proposition 65: Yes WARNING CA Proposition 65 Message: WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov Packaging: Quantity of Each: Package UOM: Dimension: 3.0000 x 3.0000 x 4.0000 inches PDF: 8231