This speaker upgrade kit consist of two 5.25" speakers and speaker grills for Roadglide, Streetglide and Tourpacks. Highlights: Manufactured with industrial grade materials optimized for harsh environments Glass fiber reinforced ABS frame for impact absorption and thermal stability Impermeable polypropylene cone is mechanically rugged and heat resistant Co-molded low-density santoprene surround chemically bonded cone Titanium dome tweeter resists corrosion with high strength-to-density ratio Low Mass Neodymium earth element magnets for maximum output 1.25" oxygen free copper voice coil on thermally absorbent aluminum former 1" titanium wide dispersion high output hemispherical dome tweeter 2-Ohm for stock replacement Integrated 6dB high-pass crossover protects tweeter from harmful frequencies 92dB (1w/1m) SPL efficiency / 60-22kHz frequency response 75w RMS power rating / mounting depth: 2.00"