Feel the power!
MPFI System, Stealth Ram, SBC w/23 Deg.Heads, 30 PPH, 385-480 HP, Polished
Want to feel raw power every time you step on the loud pedal? Then you'd better get one of Holley's Stealth Ram MPFI systems on your street machine. They combine Holley's Commander 950 engine management system with the power-building Stealth Ram manifold. The plenum and runner design promote excellent mid-range torque, along with outstanding high-rpm power. PC-based tuning takes the guesswork out of getting your system running right. These systems are designed to handle up to eight high-impedance and four low impedance injectors, to provide generous high-flowing street/strip power without turbulence. Everything you need to create maximum power is included, right down to the software and tuning manuals.
Vendor Holley
Product Line Holley Stealth Ram MPFI Systems
EGR No
Injection Style Multi-port
Metering Style Speed density
Intake Manifold Included Yes
Intake Section Included Complete
Intake Material Aluminum
Intake Finish Polished
Engine Block Style Stock/OEM standard deck
Fuel Rails Included Yes
Throttle Body Included Yes
Throttle Body Mounting Flange (Not Specified)
Venturi Quantity 2
Venturi Diameter (mm) 58 mm
Airflow Rate (cfm) 1,000 cfm
Throttle Body Material Billet aluminum
Throttle Body Finish Natural
Injectors Included Yes
Injector Size (lbs/hr) 30
Calibration Module Included No
ECM Included Yes
Wiring Harness Included Yes
Oxygen Sensor Included Yes
Fuel Pump Included Yes
Fuel Pressure Regulator Included Yes
Distributor Included No
MAP Sensor Included Yes
IAT Sensor Included Yes
TPS Sensor Included Yes
IAC Motor Included Yes
Quantity Sold as a kit.
Small block package big block power.
Engine Assembly, Crate Engine, 425 HP, Fastburn Heads, Chevy 383, Each
These all-new GM Performance Parts ZZ383 crate engines offer big block performance with a small block price tag. With the GM Performance Parts "Fast Burn Heads" on a 383 cid this combo offers approximately 9.1:1 compression with 425 horsepower at 5400 rpm and 449 ft./lbs. of torque at 4500 rpm. These blocks have 4-bolt mains with 1-piece rear main seals, forged steel externally balanced crankshafts, 5.7 in. powdered metal connecting rods, hypereutectic flat top pistons with offset pins. Billet steel hydraulic roller camshafts are install with .509 in. intake lift, .528 in. exhaust lift, and duration at .050 in. for intake is 222 and 230 for exhaust with a lobe centerline of 112 degrees. Aluminum full roller self-aligning rocker arms are used with 1.5:1 ratios. Heads are GM Performance Parts "Fast Burn" heads with 62cc combustion chambers, 210cc intake runner volume "Fast Burn" combustion chambers with 2.00 in. lightweight hollow stem intake valves and 1.55 in. sodium filled exhaust valves. LT4 Corvette valve springs and lightweight retainers are used. These heads have "D" shaped exhaust ports and have dual bolt pattern intake manifold and valve cover configurations. Cast iron long leg, standard "V" belt rotation water pumps with 1979-86 power steering pump boss. Addition items that are included with these crate engines are 8 in. harmonic balancers, 12 3/4 in. automatic flexplates, 4 quart oil pans with windage trays, painted valve covers with oil cap, grommets, provisions for PCV and breathers. Composite front timing covers, spark plugs, engine oil dipstick and tube passenger side location. Brass freeze plugs, fuel pump block plates and engine lift taps for an easy install.
Vendor GM Performance Parts
Product Line GM Performance Parts ZZ383 cid 425 HP Engine Assembly
Engine Assembly Style Crate motor
Assembled Yes
Cylinder Heads Included Yes
Carburetor Included No
Distributor Included No
Oil Pan included Yes
Valve Covers Included Yes
Timing Cover Included Yes
Water Pump Included No
Harmonic Balancer Included Yes
Flexplate Included No
Flywheel Included No
Air Cleaner Included No
Spark Plugs Included No
Spark Plug Wires Included No
Computer Included No
Wiring Harness Included No
Rear Main Seal Style 1-piece
Quantity Sold individually.

