Ignition Coil and Iridium Spark Plugs for Cadillac CT4 (2020-2022) 2.0L

High-Dielectric Ignition Coil and Iridium Spark Plug Kit for 2020-2022 Cadillac CT4

What it Does: The Ignition Coil and Iridium Spark Plug Kit replaces degraded factory secondary ignition components on the 2020-2022 CT4 to eliminate boost-induced misfires, stabilize idle, and restore peak combustion efficiency.

The Stock Cadillac CT4 Thermal Breakdown and Spark Blowout

The direct-injected LSY 2.0L turbo engine packages the pencil ignition coils tightly within the cylinder head valley, subjecting factory windings and internal dielectric epoxy to extreme thermal cycling. Over time, OEM primary and secondary windings degrade, yielding internal resistance shifts, dielectric breakdown, and micro-arcing through the boots. Under elevated cylinder pressures during high-load boost conditions, worn factory plugs suffer from electrode erosion and widened gaps, which overburdens the weakened coils and causes high-rpm spark blowout, hesitations, and pending misfire codes (P0300–P0304).

The Engineering Solution

This comprehensive tune-up kit features four reinforced pencil ignition coils paired with fine-wire iridium spark plugs designed to withstand high-cylinder-pressure environments. The coils utilize high-grade magnetic silicon steel cores wrapped in heavy-gauge copper winding and encapsulated in high-temp vacuum-potted epoxy to prevent internal insulation rupture and voltage drop. Matched with laser-welded iridium-tipped spark plugs featuring trivalent metal plating to prevent corrosion and anti-fouling ceramic insulators, this system delivers stable arc retention, lower required firing voltages, and sustained spark energy across the entire rev range.

Technical Specifications

Compatibility

• 2020 Cadillac CT4 (2.0L Turbo I4 LSY - Luxury, Premium Luxury, Sport)
• 2021 Cadillac CT4 (2.0L Turbo I4 LSY - Luxury, Premium Luxury, Sport)
• 2022 Cadillac CT4 (2.0L Turbo I4 LSY - Luxury, Premium Luxury, Sport)

Frequently Asked Questions

Does this fit the Alpha 2 CT4?
Yes, this is a direct fit for the 2020-2022 Cadillac CT4 equipped with the LSY 2.0L turbo inline-4 engine.

Are the spark plugs pre-gapped for direct-injected turbo applications?
Yes, the iridium plugs come pre-gapped to factory factory specifications, though verifying gap with a non-contact feeler gauge prior to installation is recommended.

The Cadillac Precision Standard

Direct-injection luxury platforms demand zero-tolerance ignition delivery; this kit provides exact OE-impedance matching to ensure complete diagnostic transparency and smooth, misfire-free power delivery.