90 degree configurations, would not require crankshafts with flying arms, split crankpins, or seven main bearings to be even-firing. However, the primary imbalance caused by odd number of cylinders in each bank still remains in a 120 degree V6 engine. This differs from the perfect balance achieved by a 90 degree V8 engine with a commonly used crossplane crankshaft, because the inline-four engine in each bank of the V8 engine does not have this primary imbalance. A 120 degree design also results in a large width for the engine, being only slightly narrower than a flat-six engine (which does not have the balance problems of the V6 engine). Therefore, the flat-six engine has been used in various automobiles, whereas use of the 120 degree V6 engine has been limited to a few truck and racing car engines, with the exception of McLaren Automotive's M630 V6 engine, which uses a 120 degree bank angle with a single balance shaft to eliminate all primary couples. The McLaren M630 engine also takes advantage of the wide angle by placing the turbochargers inside the vee, commonly referred to as a 'hot vee' configuration. The Ferrari 296 GTB is the first Ferrari road car to sport a V6 turbo with a vee angle of 120 degrees between the cylinder banks. Other angles Other angle V6 engines are possible but can suffer from severe vibration problems unless very carefully designed. Notable V-angles include: 45 degrees — EMD 567 and EMD 645 locomotive, marine and stationary Diesel engines. These engines were based on V8 and V16 engines which also used a V-angle of 45 degrees. 54 degrees — 1994-2004 General Motors 54-degree automotive engine. A slightly smaller than usual V-angle was used to reduce the width of the engine, allowing it to be used in small transverse-engine front-wheel drive cars. 65 degrees — 1956-1975 Ferrari Dino automobile engine. The V-angle was increased from the then-common 60 degree angle to allow larger carburetors to be used (for potentially higher power in race tuning). Crankpins with an offset of 55 degrees within every pair of cylinders were used to achieve the even firing interval of a 60 degree V6 engine. The 2009–present Nissan-Renault V9X automobile engine also used a 65 degree bank angle, to allow a turbocharger to fit between the cylinder banks. 72 degrees — Mercedes-Benz OM642 BlueTEC diesel engine. This engine uses crank pins offset by 48