post-catalyst exhaust gases; siamesed absorption-type middle silencer (Q7 with crossover) and siamesed rear silencer, separate rear silencers on RS 4 with vacuum-operated flap valves dimensions Q7 (for auto transmission with plate-type flywheel): approx. , RS4 (for 6-speed manual with dual-mass flywheel): approx. DIN-rated power & torque outputs, ID codes, applications at 6,800 rpm; at 3,500 rpm, 85% available from 2,000 rpm — BAR: Audi Q7 (03/06-05/10), Volkswagen Touareg (06/06-05/10); BVJ: Audi C6 A6 (05/06-08/11), Audi D3 A8 (06/06-07/10) at 7,000 rpm — CAU: Audi S5 (06/07-03/12) at 7,800 rpm; at 5,500 rpm, 90% available between 2,250 and 7,600 rpm, 8,250 rpm rev limiter — BNS: Audi RS 4 (B7) (09/05-06/08); BYH: Audi R8 (04/07-09/10) references Awards was placed in the 2005 and 2006 annual list of Ward's 10 Best Engines 4.2 V8 40v identification parts code prefix: 079 engine displacement & engine configuration 90° V8 engine; cylinder spacing; bore x stroke: , stroke ratio: 1.1:1 – undersquare/long-stroke, 521.5 cc per cylinder cylinder block & crankcase homogeneous monobloc low-pressure gravity die cast hypereutectic 'Alusil' aluminium-silicon alloy (AlSi17Cu4Mg) with a closed-deck design, mechanically stripped hard silicon crystal integral liners, honed under simulated mechanical stress; five main bearings; die-forged steel crankshaft cylinder heads & valvetrain cast aluminium alloy, five valves per cylinder, 40 valves total; lightweight low-friction roller cam followers with automatic hydraulic valve clearance compensation, roller chain-driven double overhead camshafts aspiration synthetic material two-stage variable intake manifold fuel system & engine management two linked common rail fuel distributor rails, multi-point electronic sequential indirect fuel injection with eight intake manifold-sited fuel injectors; Bosch Motronic ME 7.1.1. electronic engine control unit (ECU); 98 RON/ROZ (93 AKI) EuroSuperPlus (premium) unleaded recommended for maximum performance and fuel economy exhaust system two multi-stage catalytic converters dimensions length: , mass: DIN-rated motive power & torque outputs, ID codes at 6,600 rpm; at 3,500 rpm, 6,800 rpm max — Audi A6, BAT, A8: BFM (BFM engine is belt driven) at 6,200 rpm; at 2,700–4,600 rpm, 6,500 rpm max — Audi A6 allroad: BAS at 7,000 rpm; at 3,500 rpm — Audi S4: BBK (03/03-03/09) at 7,200 rpm; at 3,000 rpm — Audi S4: BHF (03/03-03/09 – US/Korea only) at 6,500 rpm; at 2,800-3,700 rpm — Volkswagen Phaeton: BGH, BGJ (Belt driven) applications Audi B6 S4, Audi B7 S4, Audi C5 A6 allroad (BAS: 07/02-08/05), Audi C6 A6 (BAT: 05/04-05/06), Audi A8 (BFM: 10/02-07/10), Volkswagen Phaeton (BGJ: 05/03-07/03, BGH: 08/03-05/10)