Tom and Ray Magliozzi, aka Click and Clack the Tappet Brothers, are riding high, even in retirement. (Photo: WBUR)

For 147 million people, Friday is the holiday shopping day known as Black Friday. For 23.4 million subscribers to the SiriusXM Satellite Radio service, it’s the day “Car Talk” premieres in a three-hour rush-hour block.

The show, hosted at WBUR-FM by Tom and Ray Magliozzi, aka Click and Clack the Tappet Brothers, ended in October with their retirement but is still distributed by NPR using material from 25 years of show archives. Sirius is doing much the same — but three episodes at a time on its public radio and channels 121 and 205, starting at 3 p.m. and 9 p.m. Mondays through Fridays (as well as an hour at 7 a.m. and 1 p.m. Saturday and 6 a.m., noon and midnight Sundays). The car advice show already runs for an hour Saturdays and Sundays on Sirius’ NPR channel.

It all starts on Thanksgiving with a 9 a.m. to 5 p.m. “Car Talk” marathon.

“Their program has been a hit for 25 years now, and we want to give our listeners much more than just one hour a week of these guys. A three-hour, daily block of Car Talk is the perfect daily drive-home companion after work,” said Jeremy Coleman, senior vice president for talk and entertainment programming at Sirius.

The brothers’ website also has a constant flow of new content.

As retirements go, these are a couple you could miss if you didn’t already know about them.

The brothers attended the Massachusetts Institute of Technology, have offices in Harvard Square (the infamous faux law firm of Dewey, Cheetham & Howe visible above the Curious George Store) and get hands-on with cars whenever they want to at their Good News Garage at 75 Hamilton St., Cambridgeport.