Part Type: Firewall Pass Through CNC Machined From 6061-T6 Billet Aluminum, Stainless Steel Hardware Fits 2" Hole Sizes Commonly Used In Firewalls With 1.2" Diameter Center Holes Center Hole Is 1.2 Inch Diameter. This Will Also Fit The Engine Only Harness for Terminator X. Black Anodized For Great Appearance And Anti-Corrosion Condition: NewColor: BlackMaterial: AluminumPart Type: Firewall Pass ThroughUniversal Fitment: YesVintage Part: YesMounting Style: Bolt-OnFitment: 1.2" - through a 2" holeCenter Hole Is 1.2 Inch Diameter. This Will Also Fit The Engine Only Harness for Terminator X.CNC Machined From 6061-T6 Billet Aluminum, Stainless Steel HardwareBlack Anodized For Great Appearance And Anti-CorrosionFits 2" Hole Sizes Commonly Used In Firewalls With 1.2" Diameter Center HolesDesigned Specifically For Use for Holley Terminator X Max System.