The 2+2 is a full size muscle car manufactured by Pontiac, built on the B-body chassis. It debuted for the1964 model year as a trim-only option for the Catalina with special door panels, bucket seats with a center console, and exterior badging. Pontiac marketed the 2+2 as the "big brother" to the popular GTO. Beginning in 1965 the name Catalina was no longer found on the car, although it was still an option on the Catalina. The 2+2 was equipped with a 421 cu in (6.9 L) V8 engine,(428 cu in for 1967) dual exhaust, heavy-duty front springs as well as unique exterior body trim. It continued on the same platform, but became a separate Pontiac series for the 1966 model year The 2+2 reverted to an option on the Catalina for 1967 ,the last year of production in the U.S.