Love him or hate him, agree with him or disagree, 2012 NASCAR Sprint Cup Series champion Brad Keselowski always has strong opinions on the state of the sport.

After Sunday's race at Chicagoland Speedway, where the cars of race-winner Martin Truex Jr. and Jimmie Johnson both flunked NASCAR's Laser Inspection Station and Kyle Busch flunked once, Keselowski took to Twitter.

And he seemed to suggest that teams have figured out a way to change the shapes of cars on track, which could explain why the same cars that pass the LIS inspection in pre-race flunk it in post-race.

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W/respect to @NASCAR

Our sport is on a tough path, we are trying to change a culture or "Transformer cars" that go through tech before race

— Brad Keselowski (@keselowski) September 18, 2016

And then change shape on track to create performance advantages. We all do it & it's very costly. The teams are asking them to step in.

— Brad Keselowski (@keselowski) September 18, 2016

We have to cut costs in this sport for sustainability. Those $$$ come from common areas of frivolous expense that don't drive fan experience

— Brad Keselowski (@keselowski) September 18, 2016

We are in the midst of this culture change during a tremendous challenge #TheChase

IMO, how Nascar reacts now will set the sport's future

— Brad Keselowski (@keselowski) September 18, 2016