Shop used Peterbilt 387 Suspension Crossmembers / K-Frames on MyLittleSalesman.com . Compare active listings with prices from $200 to $375. Sellers include LKQ Heavy Truck, Vriens Truck Parts, and Garabedian Equipment. Filter by condition, price, or year to find the Peterbilt 387 Suspension Crossmember / K-Frame that fits your job.