Brand new 4000-6000 TRAILER S-cam repair kit. H-27101 Replaces: E-3520AHD, B-8683HD, MK61, K-270, CQ67386 Available at our Linden, NJ warehouse. We are a  heavy-duty truck & trailer brake parts importer  manufacturer warehouse in Linden, NJ.  We offer complete line of Air brake components,  replacement parts for virtually every air brake system on  the market today. Please check our e-bay store for our  products and more details. With the experience and knowledge of 21 years in the  industry. We sell to OEM and aftermarket.  Supplying brake, and suspension, components to the  heavy-duty aftermarkets. Get superior OEM quality  replacement parts, backed by professionals with the  experience and knowledge to help get heavy duty  vehicles back on the road quickly. ALPAR, Where  Quality Meets Value! Best Regards, Sinan Altunyay   Pioneer Parts, LLP