This listing is for ONE (1) New Old Stock Aurora Plastics Co. of West Hempstead, Long Island, Speedsteer TCR PETERBILT TRACTOR TRAILER Matched COMBINATION. The TCR chassis can both be made to run Slotted by simply inserting a guide pin in a small notch. They run ‘free-wheelin’ into the corners and perform somewhat like really fast, sliding-through-the-curves, Thunderjets. With the guide pin (which I can include free if requested) they should run on just about any HO scale slot car track from Aurora, TOMY, TYCO, Marchon, Atlas etc…. I show how to do the TCR TO SLOTTED CONVERSION on my web site slotcarcentral under guides. Although not simple, most model motorists that have worked a bit on their cars should be able to do the conversion. You could also simply install an Aurora AFX or Magnatraction chassis underneath IN PLACE OF the original Speedsteer style chassis. Sold as is. Buy with confidence please check out my other offbeat slot car related items. I will pack your item(s) well try to ship promptly. Descriptions are very accurate; No Returns. PLEASE ASK BEFORE YOU BUY IF YOU ARE UNSURE. Glad to combine shipping when practical. We ship promptly professionally. We happily combine orders refund any excess s/h immediately upon shipping. We can always provide tracking. * I ONLY SHIP US Postal Service PRIORITY MAIL TO THE USA. I ONLY SHIP US Postal Service PRIORITY MAIL TO THE USA. Many Parts for about $7 total s/h, as of 2016. * * DO NOT USE SHOPPING CART! USE BUY IT NOW WAIT FOR AN INVOICE OR WILL NOT CALCULATE YOUR S/H CORRECTLY.