Ultra Plug Wire Set GM LS 9.75 Long Black

The Ultra Plug Wire Set GM LS 9.75 Long Black by MOROSO is a precision ignition system designed for GM LS-series engine builders and enthusiasts who demand reliable spark delivery and clean underhood aesthetics. This spark plug wire set addresses the critical need for dependable, noise-free ignition in high-performance and street applications where factory-quality construction meets aftermarket durability. Whether you're upgrading a stock LS engine or finishing a custom build, this wire set delivers the performance foundation every modern LS platform requires.

Built with a 7mm spiral core conductor, the Ultra Plug Wire Set ensures consistent spark velocity and minimal cross-firing—critical factors in multi-cylinder engine performance. The sleeved design provides thermal and abrasion protection, while 90-degree factory-style plug boots guarantee secure, trouble-free connections without adapter complexity. At 9.75 inches in length, these wires are engineered to fit the compact geometry of LS engine compartments while maintaining proper clearance from headers, intake manifolds, and other components. MOROSO's proven wire construction minimizes electromagnetic interference (EMI), reducing potential issues with modern fuel injection and ignition control modules—a technical advantage that separates quality wire sets from basic alternatives.

LS engine enthusiasts—from street machine builders to track-focused tuners—benefit from this complete wire kit, which simplifies installation by providing matched-length, pre-configured wire sets that eliminate guesswork and winding errors. The black finish complements modern engine bay styling while the factory boot design ensures compatibility with OEM-style valve covers and intake setups common in LS swaps and restorations. Installation is straightforward: simply route wires along existing pathways, ensure boots seat fully on plugs and coil pack connectors, and verify no wires contact hot exhaust components or moving parts. This wire set is ideal for naturally aspirated and turbocharged LS platforms, making it a smart choice for builders prioritizing ignition reliability and clean electrical integrity.