NGK 51158 Spark Plug Wire Set 6-Wire with Coil Lead, Blue Silicone

The NGK 51158 (RC-GMX057) is a 6-wire spark plug wire set with coil lead, engineered as a specific-fit standard replacement for select early-1990s GMC vehicles. NGK's ultra-low resistance magnetic core wire sets are built around a premium ferrite magnetic core wound with stainless steel, delivering a stronger, more consistent spark while providing excellent EMI/RFI noise suppression to protect sensitive electronics. The 7mm blue silicone outer jacket pairs with an inner EPDM/silicone insulation layer for outstanding dielectric strength and resistance to heat, oil, and engine bay wear.

Key Features:

• 6-wire set includes coil lead
• Premium ferrite magnetic core with stainless steel winding for ultra-low resistance
• High-temp silicone outer jacket and EPDM/silicone inner insulation for superior dielectric strength
• 7mm insulation outside diameter; blue insulation color
• Black spark plug end boots: 4 angled (90°) and 2 straight
• Black coil/distributor end boot at 90°; spark plug boot material: silicone
• Spark plug boots glued with silicone sealer for a watertight seal
• Stainless steel terminals with up to 3 serrated crimps for maximum terminal retention strength
• Locking C-shaped spring clip with corrosion-resistant plating for a secure, positive terminal connection
• Built-in EMI/RFI noise suppression
• Specific fit; no wire separators included

NGK is a globally recognized OE ignition supplier with over 80 years of experience. This wire set is manufactured to meet or exceed OE standards for fit, performance, and durability. Fits select 1991–1993 GMC models. California Prop 65 Warning: Cancer — www.P65Warnings.ca.gov.