Dodge Challenger R/T
The Challenger got a whole arsenal from Mopar when it was introduced, which meant you could spec it in an R/T package with 440 and 426 Hemi engines. For 1971, Dodge tuned down its wild pony car a bit, giving it a slight restyling and killing the convertible option on the R/T model (via Hemmings).
However, the 440 and Hemi remained the top engine options and the Challenger was as fast as the year before. But the end was in sight since the Hemi would be dropped for the 1972 model year. The power would gradually go down in the next few years. The 1972 Challenger R/T got a new front and rear end and its lineup of engines was even smaller. The R/T model only got 240 hp from its 340 V8 engine and the performance wasn’t so excellent.