The Slammology shift knob is part of our Hybrid series which features a weighted stainless steel core and interchangeable thread on cover. The Slammology is composed of a Slamm cover + Ology core.Homage to the shape of our famous Slammer, the Slammology provides a weighted shift knob experience with the cool comfort of a Delrinï¾® ball shaped cover. The 500 grams of mass behind the Slammology will revolutionize your shifting experience.Select your choice of a black, white, red or blue Delrinï¾® Slamm cover. Even though the Slamm cover hides the shift gate pattern engraving, this allows for other style covers to screw on and expose the shift gate pattern.WHAT IS A HYBRID SHIFT KNOB?By definition a hybrid is "an object made by combining two different elements". The Raceseng Hybrid shift knobs are a combination of a weighted stainless steel core with interchangeable screw-on covers made from a variety of materials and colors suited to your style and needs..HOW DOES IT WORK?The idea is simple and the execution is flawless. The cover effortlessly threads onto the core allowing you to change the style of your shift knob in seconds.ONE CORE... MANY COVERSAs the Hybrid product line expands, you will keep your core and purchase other interchangeable covers of different materials and colors.SMOOTHER SHIFTING!With the weight in all the right places, Slammology redefines your shifting experience through the look and feel of how you shift into gear. You will experience smoother and faster shifts!HOW?Well, to put it as simply as we can, the heavier the knob, the easier it will make shifting feel. Its not magic, its physics. Weight in motion directly relates to how an object will react to an opposing force. In this case, the opposing force is the gate pattern and counter springs that are connected to your shift arm that tell you the shift pattern of your car. The difference felt when shifting into the next gear requires far less effort due to the additional momentum created by the increased mass.SPECSThe Slammology was designed to mimic the overall ball shape of our Slammer shift knob. The Slamm cover is cnc machined from Delrinï¾® which acts as a cooling insulator, hot shift knobs are a thing of the past! The Ology core is cnc machined from 303 stainless steel and features an exposed bottom profile.WEIGHT1.1 lbs | 500 gramsHEIGHT3" | 75.6mmDIAMETER2 1/4" | 56.5mmCOLORS: BLACK, WHITE, RED, BLUE*PLEASE SPECIFY COLOR IN THE MESSAGE AREA DURING CHECK OUT