10.5mm high performance racing spark plug wires, universal set for BBC Engines. Ready to install straight out of the box. Electronic ignition HEI plug wires with 90-degree boots on both ends. Deliver more spark to your plugs with a set of high performance ignition wires. Specifications: Part number: SP10-390-1010/350383454 Fits 5.7L V8 engines from 1988–1999 Compatible with various models including AM General, NPR, Blazer, K3500, C1500, C2500, G10, G20, G2500, G30, G3500, P2500, P30, P3500, R10, R1500, R20, R2500, R3500, V10, V1500, V20, V2500, V3500, C2500 Suburban, C3500HD, K1500, K1500 Suburban, K2500, K2500 Suburban, K3500, and others with 5.0L or 5.7L V8 engines (specific year ranges apply as listed). Color: Red + Black Material: Silicone Package Contents: 9 x Spark Plug Wire Note: Only the items listed are included. Other products are not included. Due to lighting and display differences, the actual color may vary slightly from the image. Measurement may vary by +/- 1-3 cm.