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 efficiency 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, K1500, G3500, R3500, V3500, P3500 from 1988–1999 (specific year ranges vary by model). Color: Red + Black Material: Silicone Package includes: 9 x Spark Plug Wire Note: Lighting and display settings may cause slight color variations between the product image and actual item. Measurement may vary by +/- 1-3cm.