Haltech Firewall Rubber Wiring Grommet - 51mm (2in) OD 21mm (13/16in) ID – High-performance automotive part designed for precision, reliability, and optimal compatibility. Ideal for tuning, upgrades, and motorsport applications. Supports advanced engine management strategies. Keywords: haltech, firewall, rubber, wiring, grommet, -, 51mm, (2in), od, 21mm, (13/16in), id.