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A Regular Production Option (RPO) is a 3-digit standardized code used by General Motors to designate vehicle options & modifications. RPO codes designate how a vehicle is built, and they've been used on dealership order forms and in assembly plants since at least the 1950s ( see Corvette C1 ).
The first version, RPO code MG2 was used for all GM V6 applications (FWD and the RWD Fiero) and the second version, RPO code MG1, was used for the 2.0 L turbocharged engine used by Pontiac and Buick. Gear ratios are given below, as taken from the GM Product Service Training Manual. MG2 and MG1 ratios: 1st gear: 3.50:1
LD5 was the RPO for engines with chassis code "A", LD7 was used for the 1977-only VIN code "C" engines. One quick idea was tried by Buick engineers—taking an old Fireball V6 picked up at a junkyard and installing it into a 1974 Buick Apollo. The solution worked so well that GM wanted AMC to put the engine back into production.
The Vortec 2200 (RPO code L43) is an OHV straight-4 truck engine. This engine is equipped with secondary air injection, and is flex-fuel capable. It is entirely different from the Iron Duke, and was the last North American iteration of the GM 122 engine. The 2200 uses an iron block and aluminum two-valve cylinder head.
The "LS" nomenclature originally came from the Regular Production Option (RPO) code LS1, assigned to the first engine in the Gen III engine series. The LS nickname has since been used to refer generally to all Gen III and IV engines, [14] but that practice can be misleading, since not all engine RPO codes in those generations begin with LS. [15]
Learn how to download and install or uninstall the Desktop Gold software and if your computer meets the system requirements.
Flywheel bolt pattern is the same as the six and V8, with 1 ⁄ 2 inch (12.7 mm) bolts for the flywheel if produced after the 1966 model year. Production of the engine was shifted to Mexico in 1980, and later variants of this engine were marketed as the High Torque 4.8 L and by its RPO code L25. Unlike the later 250 inline 6 that was designed ...
The Cadillac Blackwing V8 (GM RPO LTA) is a twin-turbo DOHC V8 engine that was produced by the Cadillac Division of General Motors solely for use in its CT6-V and CT6-Platinum model years 2019 and 2020. It is a clean sheet engine design, as well as the Division's first ever twin-turbo V8 engine.