Denny Hamlin Warns of NASCAR's New Short-Track Package Impact

Denny Hamlin warns of NASCAR's fragile new short-track bumper foam removal at North Wilkesboro, citing radiator, tire, and engine risks. NASCAR's short-track racing is about to look different. The Window World 450 at North Wilkesboro Speedway will debut an updated short-track package that removes the energy-absorbing bumper foam from the Next Gen cars. The change, made at drivers' request to reduce violent impacts, has drawn sharp pre-race warnings from veteran Denny Hamlin.

Speaking hours before the green flag, the Joe Gibbs Racing driver expressed uncertainty about the bumper's durability. “Is it a 2-mph impact that’s going to crush the front end? Is it a five, a 10? They seem to think it’s going to be pretty fragile,” Hamlin said. “I don’t know. We’ll see how long it lasts.”

The concern isn't just cosmetic. Hamlin outlined a cascade of potential failures: a crushed front end could damage radiators, cut tires, and affect air intake, leading to engine issues. “We’ve been taking bits and pieces off this Next Gen car for quite some time now to try to fix a few things,” he added. “To have no bumper support is going to be interesting.”

The rule change effectively targets the traditional “bumper-and-run” technique — the practice of using the front bumper to nudge or slam a competitor out of the way on short tracks. In the 20th century, drivers would use a stiff rear bumper and brake-check a competitor entering a turn to push in the car's front end, causing overheating and eliminating the competition. The new package could make that tactic far more costly.

Chris Buescher echoed the sentiment, saying the change forces drivers to “respect” their race car “a little bit more.” “We’ve joked about it being bumper cars at times because it’s just a little bit of pinballing around,” Buescher said. “I think it’s trying to take some of that shock from our seat out of the impacts that we feel. On the other side, it’s going to force you to have a little bit more respect out there to be able to make this thing make it last 450 laps.”

The shift represents a significant technical and strategic adjustment for teams. Crew chiefs and engineers must now account for a more fragile front end when setting up the car for short-track races. Drivers accustomed to using contact as a passing tool will need to recalibrate their approach. The margin for error on bump-and-run moves shrinks dramatically — a light tap might be fine, but a harder hit could end the day.

Hamlin's warning underscores a broader pattern: NASCAR has been iterating on the Next Gen car since its introduction, removing parts and tweaking rules to address driver feedback. This latest change, while aimed at improving safety and reducing harsh impacts, introduces new variables that could reshape short-track strategy.

For fans, the question is whether the removal of the bumper foam will produce cleaner racing or more mechanical attrition. The Window World 450 at North Wilkesboro will provide the first real-world test. If Hamlin's concerns prove accurate, the race could see a higher-than-usual number of cars with damaged front ends, overheating engines, and cut tires — a stark departure from the bumper-car style that has defined short-track racing for decades.

As the Cup Series heads to North Wilkesboro, the garage is watching closely. The bumper-and-run may not be dead, but it just got a lot more expensive.