The Chrysler 300 "letter series" are high-performance personal luxury cars that were built by Chrysler in the U.S. from 1955 to 1965. After the initial year, which was named 300-C, the 1956 cars were designated 300B. Successive model years given the next letter of the alphabet as a suffix (skipping "i"), reaching the 300L by 1965, after which the model was dropped.

The 1956 300B was fairly similar externally, distinguished by a new tailfin treatment, but with larger engines, two models of 354 cu in (5.8 L) Hemi V8 with either 340 or 355 hp (254 or 265 kW). A total of 1,102 were sold. Performance was a little better than the previous year's, being measured at almost 140 mph (225 km/h). A 6.17 ratio rear end was also added to the options. Front leg room was 44.6 inches.[1] New was the Highway Hi-Fi phonograph player.[1]
With the optional 355 hp (265 kW) 354 cu in (5.8 L) engine, the 300B became the first American car to produce 1 horsepower per cubic inch, besting Chevrolet with their fuel-injected 283 cu in (4.6 L) by one year.

Overall 1956 Chrysler 300B sales dropped to 921.
Price - $4242

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