Ford supplied Essex V6-powered Transit vans to the police and ambulance services in the UK from the late 1960s until 1989, when it was replaced by more modern engines such as the fuel injected 2.8 and 2.9 L Ford Cologne V6 engine although the Essex V6 was even used until April 2000 in South Africa. TVR contracted the company Broadspeed to develop a turbocharging system for their TVR 3000S turbo. In lieu of fuel injection, the carburettor was run inside a pressurized box atop the engine, and the turbocharger itself was mounted low and forward in the engine compartment, requiring the exhaust manifolds to exit forward. The compression ratio was lowered from 9.0:1 to 8.0:1 to reduce the engine's internal stresses. Turbocharging substantially increased horsepower, from and torque from . Broadspeed also designed a turbocharging system For the Mk1 Ford Capri 3.0, available since early 1970 these Capris were known as "Broadspeed Bullet Capris". The engine was heavily modified and included modified cylinder heads, a high-lift camshaft, a re-jetted carburetor, a completely blueprinted rotating assembly, lowered 8.2:1 compression ratio, a modified inlet manifold and exhaust system using a single turbocharger. Their power was substantially increased (by 63%) from . Similar to the TVR 3000S' turbocharging system, it used a "blow-through carburettor" system in which the standard but re-jetted 38 DGAS Weber carburetor was run inside a pressurised airbox. Performance figures further increased with the uprated post-October 1971 versions of the engine. The company Janspeed, well known for their high performance exhaust systems, also designed a turbocharging system for the Ford Essex 3.0 L and 1.6 – 2.0 L OHC engines, although these were much simpler than the turbocharging system offered by Broadspeed, Janspeed promised a 25% increase in horsepower, boosting the engine's power output from to around using a single Roto-Master turbocharger mounted directly on top of the left bank of the engine providing of boost. The 2.5 L and 3.0 L engines share the same block, connecting rods and bore, differing only in crank throw and pistons, 3.0 L pistons have a length of and 2.5 L pistons have a length of / . Companies like Specialised Engines, Essex engines and Ric Wood have professionally built and developed large displacement 3.2 L, 3.4 L and even 4.0 L conversions and forced induction conversions for the Essex V6 with power outputs reaching as high as . US emissions certification In