smooth and durable. The two-barrel (twin-choke) Hitachi carburettor was significantly improved with the addition of a power valve circuit. The A12 engine produced and torque. A special version of the A12 called the "A12 GX" engine, was available (A12GX or A12T for front-wheel drive applications). With twin Hitachi sidedraft carburetors, a longer duration camshaft and 10:1 compression ratio, it delivered at 6400 rpm, up 20 percent from a standard A12 engine. The GX engine was offered in Japanese Domestic Market Nissan Sunny 1200 GX sedans and coupes. The identical specification A12T engine was offered in the front-wheel-drive Nissan Cherry X-1. An overbored version of the A12 was used in period race cars, including Nissan factory (works) racing Sunnys. Many were overbored from the original to using Tomei forged pistons for a displacement of , while others used Datsun Competition forged pistons, for a displacement of . These legendary engines competed in Japan's Touring Sedan (TS) class races against the 1200s archrival Toyota Starlet. Perhaps the most interesting variety of A series engines was the AY12 engine. This was a special race-only Nissan factory (works) racing version with a crossflow cylinder head. The AY12 was used in an under -class with a bore diameter. The intake valve was and exhaust valves were . The pistons were also a special design and the valve rocker system was different from the standard A12 due to the use of a crossflow layout for the racing engine. Applications 1970–1973 Nissan Sunny B110, and B120 (Nissan Sunny Truck) 1971–1973 Nissan Cherry E10 (Datsun 120A) 1970 Nissan 270X concept 1985-2001 Premier 118NE (Fiat 124) 1974 redesign For the 1974 model year, the A engine was modified, and all subsequent A engines use the new block style. Since there was increasing need for accessories like air conditioning, anti-pollution air pumps and the like, the distributor was moved from the front side of the engine to the middle of the block to make room for these accessories. Additionally, the motor mount positions were moved slightly. Nissan introduced its emission control technology, called NAPS (Nissan NAPS) with the redesign. This "new" A12 retained the same bore, stroke and most other specifications of the previous A12. Applications 1974–1978 Nissan Sunny B210 (Datsun 120Y) (not used in the US model B-210) 1974–1976 Nissan Cherry E10 (Datsun 120A) 1977.11-1982 Nissan Sunny B310 (Datsun 120Y) (not used in the US model 210) 1974–1995 Nissan