This is the new J&M 350w ROKKER XXR EXTREME Custom 2-speaker & amplifier installation kit for Harley StreetGlide or Ultra with stock Harley 4.3 Std, 6.5GT or new GTS touch-screen radio. Designed with NO SPECIAL FLASH needed. Kit includes a full range class D audio amplifier, spec'd at 175watts RMS per channel X2, (350w total) into 2-ohm load @ 14.4vdc with dimensions of 7-1/4" X 4-3/4" X 1-3/4". The included XXR 6.71" speakers are designed as exact size component/replacements for the stock 6.5" Harley fairing speakers as installed on the Harley StreetGlide, Ultra or Ultra Ltd. Comes with all necessary wiring, mounting hardware & complete installation/operation instructions.; Amplifier mounts to custom made stainless steel 2-piece bracket system, to provide solid and secure mounting inside the StreetGlide or Ultra fairing ROKKER XXR amplifiers are dialed in for this specific StreetGlide/Ultra speaker configuration, to provide maximum highway performance Custom made plug-n-play wiring harnesses are included, along with heavy gauge power/ground wires for the fused battery connection, all necessary mounting hardware & complete installation/operation instructions Spec'd at 2 ohms impedance and 300 watts maximum input (175w RMS - 91db sensitivity), speakers provide the ultimate in raw audio power and include the new custom grills with built-in high-output tweeters Lightweight waterproof speakers with one-piece woven-fiber driver cone with super-rigid metal basket design High-density lite-weight Neodymium magnet structure, specially coated to maintain flux-strength integrity even at extreme operating temperatures High efficiency vented voice-coil for improved cooling when operating at high volume levels for extended periods Mounting hole pattern and spade electrical connections are exactly the same as the factory specification, this is a total plug-and-play no-modification solution complete with easy to follow installation instructions