http://www.RSpeed.net/ asks, "Are the windows in your Miata SLOOOOOOW" Rspeed has DELRIN® window bushing guides at an unbeatable price. Only $9.95 AWESOME!!! PRICE GUYS!
The Rspeed bushings are machined and milled to exact specs from specially formulated DELRIN® POM to withstand the elements and sustain use inside the doors for years to come are situated inside the door.

The bushing is fits all NA, NB, NB2 models. Supplied with proprietary synthetic grease and locking washer to repair one of those slow windows that is driving you crazy!! Mazda will sell only the entire window assembly for over $200 each. YIKES!! They do not sell the guides individually. Now you can get these from Rspeed.net for only $9.95 !!!! Amazing Price for this product! Everyone else charges $20 to $30 for these!

What is so special about DELRIN® ? This material offers an excellent balance of properties that bridge the gap between metals and plastics. It possesses high tensile strength, creep resistance and toughness. It also exhibits low moisture absorption. It is chemically resistant to hydrocarbons, solvents and neutral chemicals. These properties along with its fatigue endurance make DELRIN® ideal for many industrial applications.