GM High Feature engine

GM High Feature V6
Alloytec LPG V6 engine in a 2006-2008 Holden VE Commodore
Overview
Manufacturer	General Motors
Also called	Alloytec V6
Production	2004–present
Layout
Configuration	60° V6
Displacement	2,792 cc (2.8 L; 170.4 cu in) 2,994 cc (3.0 L; 182.7 cu in) 3,195 cc (3.2 L; 195.0 cu in) 3,564 cc (3.6 L; 217.5 cu in) 3,649 cc (3.6 L; 222.7 cu in)
Cylinder bore	86 mm (3.39 in) 89 mm (3.5 in) 94 mm (3.7 in) 95 mm (3.74 in)
Piston stroke	74.8 mm (2.94 in) 80.3 mm (3.16 in) 85.6 mm (3.37 in) 85.8 mm (3.38 in)
Cylinder block material	Aluminum
Cylinder head material	Aluminum
Valvetrain	DOHC 4 valves × cyl. with VVT
Compression ratio	9.5:1, 10.0:1, 10.2:1, 10.3:1, 11.3:1, 11.5:1, 11.7:1, 12.2:1
RPM range
Max. engine speed	6500–7200
Combustion
Turbocharger	Twin-turbo (in some models) Single-turbo (in the 2.8L LP9 and LAU)
Fuel system	Sequential multi-port fuel injection Direct injection
Fuel type	Gasoline, E85, LPG
Oil system	Wet sump
Cooling system	Water-cooled
Output
Power output	201–464 hp (150–346 kW; 204–470 PS)
Torque output	182–445 lb⋅ft (247–603 N⋅m)
Emissions
Emissions target standard	Euro 6
Chronology
Predecessor	Buick V6 engine 54° V6 GM High Value engine LX5 (Shortstar)

The GM High Feature engine (also known as the HFV6, and including the 3600 LY7 and derivative LP1) is a family of modern DOHC V6 engines produced by General Motors. The series was introduced in 2004 with the Cadillac CTS and the Holden Commodore (VZ).

It is a 60° 24-valve design with aluminum block and heads and sequential multi-port fuel injection. Most versions feature continuously variable cam phasing on both intake and exhaust valves and electronic throttle control. Other features include piston oil-jet capability, forged and fillet rolled crankshaft, sinter forged connecting rods, a variable-length intake manifold, twin knock control sensors and coil-on-plug ignition. It was developed by the same international team responsible for the Ecotec, including the Opel engineers responsible for the 54° V6, with involvement with design and development engineering from Ricardo plc.^{[citation needed]}

GM's Australian auto division Holden produced a HFV6 engine under the name "Alloytec."