Keselowski irate with NASCAR and says he's 'questioning everything that I believe in'

Brad Keselowski sits in the garage between laps during testing at Texas Motor Speedway, Thursday, April 11, 2013, in Fort Worth,Texas. The NASCAR Sprint Cup Series NRA 500 auto race is scheduled to run Saturday, April 13. (AP Photo/The Fort Worth Star-Telegram, Ron Jenkins) MAGS OUT; (FORT WORTH WEEKLY, 360 WEST); INTERNET OUT (The Associated Press)

Brad Keselowski (2) has work done at a pit-stop during the NASCAR Sprint Cup series NRA 500 auto race at Texas Motor Speedway, Saturday, April 13, 2013, in Fort Worth, Texas. (AP Photo/Tony Gutierrez) (The Associated Press)

Brad Keselowski is pretty angry with NASCAR these days.

After another top-10 finish in Texas, the defending Sprint Cup champion says what he's seen lately has him questioning everything he believes in. He's not happy about it.

Before Saturday night's race, NASCAR confiscated the original rear-end housing from Keselowski's No. 2 Ford and the No. 22 of Joey Logano, his Penske Racing teammate. That could lead to penalties, including possibly suspensions, the loss of championship points and/or fines.

Both Keselowski and Logano recovered to finish in the top 10 at Texas.

A week earlier at Martinsville, Keselowski got a penalty for pitting outside his stall, a ruling he still disputes.

Kyle Busch won the Cup race for a weekend sweep at Texas.