provides increased air velocity at low engine speeds for improved emissions and low-rpm torque. Cylinder block material varies between aluminum used in the 2005-10 Mustang GT and cast iron used in the truck applications. The 3-valve SOHC 4.6 L engine was on the Ward's 10 Best Engines list for 2005–2008. Vehicles equipped with the 24-valve SOHC VCT 4.6 L include the following: 4-valve The 4-valve DOHC version of the Modular engine was introduced in the 1993 Lincoln Mark VIII as the 4.6 L Four-Cam V8. Lincoln marketed the engine under the name InTech after 1995. The 1993–1998 4-valve engines featured cylinder heads with two intake ports per cylinder (split-port) and variable runner length intake manifolds with either vacuum or electrically activated intake manifold runner controls (IMRC) depending on application. The engine was revised for 1999 with new cylinder heads featuring tumble-style intake ports (one intake port feeding two intake valves), new camshaft profiles, and fixed runner-length intake manifolds. These changes resulted in more power, torque and a broader power-band when compared to the earlier 4-valve engines. All 4.6 L 4-valve engines featured aluminum engine blocks with 6-bolt main bearing caps, the only exception being the 2003–2004 SVT Cobra which had a 4-bolt main cast iron block. The 1999 and earlier engines featured an aluminum block cast in Italy by Fiat subsidiary Teksid S.p.A. Since 1996, all of the 4.6 L 4-valve engines manufactured for use in the SVT Cobra have been hand-built by SVT technicians at Ford's Romeo, Michigan plant. The 4-valve DOHC 4.6 L engine was on the Ward's 10 Best Engines list for 1996 and 1997. Vehicles equipped with the 32-valve DOHC 4.6 L include the following: 5.0 L Coyote The Coyote V8, first produced in 2010 for the 2011 model year, was an evolutionary (rather than revolutionary) development of Ford's Modular V8. Ford engineers needed to design a V8, specifically for the Mustang GT, that would compete with the GM 6.2L LS3 used in the new Chevrolet Camaro, and the new Chrysler 6.4L Hemi ESF in the Charger, Challenger, and Grand Cherokee. Since this engine replaced the already popular 4.6L and 5.4L Modular Engines, this engine had to remain close to the same physical size of the outgoing 4.6L, and share other specifications with it such as bore spacing, deck height, bell housing bolt pattern, etc. in order for the engine to utilize existing Modular production line