Ignition Coil and Iridium Spark Plugs for Cadillac SRX (2004-2009) 4.6L
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Direct-Fit High-Dielectric Ignition Coil & Iridium Spark Plug Kit for 2004-2009 Cadillac SRX
What it Does: Replaces degraded factory coil packs and worn spark plugs with high-temp copper-wound assemblies and fine-wire iridium plugs to eliminate secondary misfires and restore complete combustion under load.
The Stock SRX Northstar Ignition Breakdown
The 4.6L LH2 Northstar V8 operates in a tightly packed engine bay where sustained thermal cycling degrades factory coil-on-plug epoxy seals. Over time, internal primary and secondary copper windings develop micro-fractures, causing winding resistance drift and spark dissipation. Paired with eroded factory plug gaps, this voltage leakage results in hesitation under acceleration, erratic idle harmonics, reduced fuel economy, and potential catalytic converter damage from raw unburned hydrocarbons.
The Engineering Solution
This comprehensive ignition service kit features eight coil-on-plug packs built with heavy-gauge internal copper windings and high-dielectric epoxy encapsulation to prevent voltage tracking and thermal breakdown. Direct-fit blade terminals ensure low-resistance electrical connections to the OEM harness. Paired with eight high-melting-point fine-wire iridium spark plugs, this kit maintains precise electrode gap tolerance under extreme cylinder pressures, delivering a crisp, high-energy spark across the entire RPM band.
Technical Specifications
| Fitment | 2004-2009 Cadillac SRX |
| Engine / Chassis | 4.6L Northstar V8 (LH2) / GM Sigma Platform |
| Stock Output | 320 hp / 315 lb-ft (Approx) |
| Part Number | UF564, 12597745, 12602862, 12670154, D596A, C1556 |
Compatibility
- 2004 Cadillac SRX 4.6L V8 (LH2) Base RWD / AWD
- 2005 Cadillac SRX 4.6L V8 (LH2) Base RWD / AWD
- 2006 Cadillac SRX 4.6L V8 (LH2) Base RWD / AWD
- 2007 Cadillac SRX 4.6L V8 (LH2) Base RWD / AWD
- 2008 Cadillac SRX 4.6L V8 (LH2) Base RWD / AWD
- 2009 Cadillac SRX 4.6L V8 (LH2) Base RWD / AWD
The Cadillac Precision Benchmark
Engineered to deliver smooth, CEL-free operation, this direct-replacement ignition assembly meets stringent factory resistance parameters to maintain refined V8 throttle response, effortless passing power, and luxury cruising stability.
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