Bosch SP0F000018 Sport II 3-3/8" Tachometer (Black Dial Face, Chrome Bezel) 3-3/8" black dial face with 250 degree sweep and chrome bezel with mounting hardware 0-8000 RPM range, driven by Air Core motor Adjustable redline pointer Compatible with 4, 6, and 8 cylinder engines Functions with breaker points, electronic, and most aftermarket ignition systems (not magnetos)