10.5mm high performance racing spark plug wires, universal set for SBC & BBC Chevrolet Engines. Ready to install straight out of the box. Electronic ignition HEI plug wires with 90-degree boots on both ends. Designed to deliver improved spark delivery for better engine performance. Part number: SP10-390-1010/350383454 Fits vehicles with 5.7L V8 engines including select models of AM General Hummer, Isuzu NPR, Chevrolet Blazer, K3500, C1500, C2500, G10, G20, K2500, P20, Suburban (R1500, R2500, R3500, V1500, V2500, V3500), G30, P30, K1500, R10, R20, C3500HD, GMC P2500, R2500, Jimmy, Yukon, G3500, G2500, and P3500 from 1988 to 1999. Color: Red + Black Material: Silicone Package includes: 9 x Spark Plug Wire Note: Light shooting and different displays may cause slight color variation between the image and actual item. Measurement may vary by +/- 1-3cm.