Family 1 and Ecotec Family 0 straight-4 engines; a similar technology is used in 3.2 L 54° V6 engine Peugeot: 2.2 L I4, 3.0 L V6 Porsche: VarioRam – 964, 993, 996, Boxster Proton: Campro CPS and VIM – Proton Gen-2 CPS and Proton Waja CPS; Proton Campro IAFM – 2008 Proton Saga 1.3 Renault: Clio 2.0RS Rover: Rover 623, Rover 825, Rover 75 v6, Rover 45 v6 Subaru Legacy 1989–1994 JDM EJ20 2.0-liter naturally aspirated DOHC 16-valve flat-4 Subaru SVX 1992–1997 EG33 3.3-liter naturally aspirated DOHC 24-valve flat-6 Subaru Legacy and Subaru Impreza 1999–2001 JDM EJ20 2.0-liter naturally aspirated DOHC 16-valve flat-4 Toyota: T-VIS – (Toyota Variable Induction System) used in the early versions of the 3S-GE, 7M-GE, and 4A-GE engines, and ACIS (acoustic control induction system) Volkswagen: 1.6 L I4, VR6, W8 Volvo: VVIS (Volvo variable induction system) – Volvo B5254S and B5204S engines as found on the Volvo 850 vehicles. Longer inlet ducts used between 1500 and 4100 rpm at 80% load or higher. See also Cylinder head porting Fusible core injection molding References Engine technology Auto parts