High Performance Ignition Coil for Buick LaCrosse (2008-2009) 5.3L

High-Performance Ignition Coils for 2008-2009 Buick LaCrosse (LS4 / W-Body)

Designed to restore optimal spark energy and eliminate under-load misfires: This complete 8-pack of UF414 upgraded ignition coils provides a direct-fit replacement that exceeds factory specifications for the transverse-mounted 5.3L V8, ensuring consistent combustion and stable idle.

The Stock W-Body Ignition Weakness

The factory ignition coils on the 5.3L LS4 V8 are notorious for degrading over time due to severe heat cycling within the cramped W-Body engine bay. Because the rear bank of cylinders sits tightly against the firewall, ambient underhood temperatures soar, leading to premature breakdown of the internal epoxy and primary windings. When these stock coils begin to fail, the engine experiences weak spark delivery. This translates to noticeable hesitation under acceleration, rough idling, decreased fuel economy, and dreaded P0300-series misfire codes. The OEM components simply lack the thermal resistance required for sustained high-temperature operation over high mileage.

The Engineering Solution

This UF414 high-performance coil pack set is engineered to resolve the thermal degradation issues inherent to the factory setup. Featuring high-grade copper wire for both primary and secondary windings, these coils maximize voltage output to the spark plugs for a more complete burn and improved throttle response. The housings are constructed from a dense, heat-resistant dielectric polymer, reinforced with specialized internal epoxy that prevents voltage leaks and withstands extreme engine bay temperatures. By delivering a hotter, more consistent spark, these upgraded coils prevent spark blowout under heavy load, stabilize idle characteristics, and fully restore the 300-horsepower potential of the LS4 engine.

Technical Specifications

Compatibility

• 2008 Buick LaCrosse Super 5.3L V8
• 2009 Buick LaCrosse Super 5.3L V8

The Buick Muscle Caliber

For V8-powered GM sedans, maintaining precise ignition timing and powerful spark delivery is non-negotiable. This complete ignition coil upgrade ensures your LaCrosse Super retains its factory muscle, delivering smooth, uninterrupted power delivery and restoring the reliable performance demanded by the LS4 platform.