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 AM General Hummer, Isuzu NPR, Chevrolet Blazer, K3500, C1500, C2500, G10, G20, K2500, P20, Suburban models, G30, P30, R10, R20, V10, V20, C3500HD, Jimmy, Yukon, and GMC P2500, R2500, G2500, G3500, P3500 models from 1988 to 1999. Color: Red + Black Material: Silicone Package includes: 9 x Spark Plug Wire Note: Package includes only the items listed. Other accessories are not included. Due to lighting and display differences, actual product color may vary slightly from images. Measurement may vary by +/- 1-3cm.