Inline Tube Factory Hood Tach Guage Tachometer 5100 RPM Red Line Compatible with 1968-72 ALL Pontiac GTO and Firebird Has the correct shape outer shell with hard edge (just like factory originals) The meter is the same as the factory so it will fit in the factory hole - unlike others where the hole in the hood has to be bigger. Comes with correct mounting nuts and -Tach decal on bottom Top and bottom are screwed together like factory (not silicone glued together like the competitors)