With the production of the 6.4 and 6.2 Hemis, the former 6.1 "top dog" engine is not getting much love. This engine, in factory condition, is good for a 13.0 sec. 109 mph quarter. Here are the impressive specs of the 6.1 SRT: Engine -6.1 Liter (372 Cubic Inches) -425 BHP @6,200 RPM -420 lb-ft. Torque @4,800 rpm -Iron Block with Reinforced Bulkheads; Aluminum Heads -OHV 2-Valve/Cylinder, Chain Drive -4.06 Bore, 3.58 Inch Stroke -10.3:1 Compression Ratio -2.08 Intake & 1.60 Exhaust Valves -Sodium-Filled Hollow Stem Intake Valves -External Dampers on Valve Springs -Electronic Sequential Port Fuel Injection -Cast Eutectic High-Load Flat-Top Alloy Pistons -Piston Oil Cooling Jets -Powder Metal High Strength Connecting Rods -Forged Micro-Alloy Steel Crankshaft with Tri-Metal Main Bearings -Ported Hemi Heads with Large Cross-Sectional Area -Billet Steel High-Strength Camshaft (.571/.551 in. lift 283/286 degrees duration) -Cast Aluminum Intake Manifold, Core-Dipped Runners -High Flow Capacity Fuel Injectors -Windage Tray -Shorty Clamshell Exhaust Headers Drivetrain -5-Speed Getrag Automatic - 3.06:1 Final Drive Ratio -Sure-Grip Anti-Lock Differential- -Anti-Spin Rear Differential -Electronic Stability Program/Brake Assist -All-Speed Traction Control Brakes (Brembo System) -14.2 Inch Vented & Slotted Discs (front) -4-Piston Fixed Calipers -13.8 Inch Vented & Slotted Discs (rear) -Vacuum-Assisted ABS Wheels & Tires -Alcoa Forged Alloy (20 x 9) -Goodyear Eagle F1 245/45/ZR20 Steering & Suspension -Rack & Pinion -Hydraulic Assist Steering (2.7 turns lock to lock) -Upper & Lower A-Arms, Coil Springs, Bilstein Tube Shocks (Front) -Multi-link, Coil Springs, Bilstein Tube Shocks (Rear) -Anti-Roll Bars (30mm front & 16mm rear) Exhaust -2.75 Inch Diameter Exhaust Pipes (Chrome Tips) -One High-Flow Muffler & Two Resonators