Chad Knaus, Larry McReynolds, Bootie Barker and Doug Richert explain the rear sway bar and how it relates to grip and balance.

Larry MacReynolds and the SPEED crew talk shop and shocks on this week's edition.

Chad Knaus, Doug Richert and Bootie Barker talk about the smaller restrictor plate, the wicker size and pit strategies.

NASCAR Vice President of Competition Robin Pemberton joins the SPEED crew to talk about the state of the sport.

Larry McReynolds and the gang discuss how to get the car to handle through the corners.

Larry McReynolds and the SPEED crew discuss how the airflow through the grill and over the radiator affects the car's aerodynamics.

Watch Larry McReynolds and the SPEED crew explain springs, shocks and sway bars - all things that keep the cars low to the ground.

Larry McReynolds and Chad Knaus talk about the engineering of the fuel cell and how it makes fuel mileage such an important factor in many races.

Larry McReynolds visits a brake manufacturer and closely examines NASCAR's most important safety feature.

The NASCAR Performance gang discuss the axle problems that plagued the No. 48 and 83 teams in Atlanta.

Larry McReynolds, Chad Knaus and Doug Richert break down air flow into the carburetor.

Larry McReynolds, Chad Knaus, and Doug Richert discuss the continuing developments to radiators in NASCAR.

Larry McReynolds journeys to Brown & Miller Racing Solutions to discuss devices that allow liquid to flow through a racecar.

Chad Knaus, Doug Richert and Larry McReynolds discuss Juan Montoya's pit road speeding penalty and how NASCAR monitors speed.

Chad Knaus, Doug Richert and Larry McReynolds discuss the strides Goodyear has made to bring a good tire to IMS.

Larry McReynolds, Chad Knaus and Dough Richert discuss nitrogen in tires and air pressure changes.