4D Xtreme Custom Pipes | WELCOME TO

harley 4dTECHNICAL SPECIFICATIONS. 1200.4D 2Ω Power @ 12.6V @ 1Ω: 4 x 300 W RMS Power @ 12.6V @ 2Ω: 4 x 165 W RMS Power @ 12.6V @ 4Ω: 4 x 91 W RMS Bridge Power @ 12.6V @4D Xtreme Custom Pipes. WELCOME TO 4DXTREME CUSTOM PIPES. Skip to content. HOME; Products. Your Account; Transaction Results; Checkout; Wheels; Contact; US Dealers; Blog;