SP383 EFI Turn-Key 383 ci/450HP Crate Engine

Name: SP383 EFI Turn-Key 383 ci/450HP Crate Engine
Brand: CHEVROLET PERFORMANCE
SKU: 809-19433046
Price: 14312.35 USD
Availability: InStock

^$14,312³⁵

Truck Freight

Ships on 09/14/2026

Lowest Price Guarantee

Turn Key Crate Engine

SP383 EFI Turn-Key 383 ci Crate Engine

450 HP @ 5,800 RPM

436 ft.-lbs. TQ @ 4,800 RPM

SP383 Turn-Key 383ci/450HP Tech Specs:

Balance: External
Block: Cast iron with 4-bolt main caps
Bore x Stroke: 4.005 in. x 3.800 in.
Camshaft: Steel hydraulic roller
Camshaft Duration: 208-degree intake / 221-degree exhaust (at 0.050 in.)
Compression Ratio: 9.72:1
Connecting Rods: Heavy-duty forged steel
Crankshaft: Forged steel
Cylinder Heads: Fast Burn aluminum with 62 cc chambers
Displacement: 383 ci
Engine Type: Chevy Small-Block V8
Flexplate: 12.750 in. Diameter, 153-tooth
Fuel: 91-94 Octane (premium)
Ignition Timing: 36-degree at 4000 RPM
Max Recommended RPM: 6000
Pistons: Hypereutectic aluminum
Rocker Arms: Aluminum roller-style
Rocker Arm Ratio: 1.5:1
Valve Lift: 0.474 in. intake/ 0.510 in. exhaust
Valve Size: 2.000 in. intake/ 1.550 in. exhaust

Installation Notes:

This is a turn-key engine and includes, but is not limited to, additional accessories such as the air cleaner, MPFI system, damper, distributor, throttle body, starter, fuel pump, A/C compressor alternator and other components to complete the front accessory drive system as well as a pre-programmed self-learning engine controller.

The included flexplate is designed for automatic transmission applications. If using this engine in a manual transmission application, an externally-balanced flywheel is required (sold separately).

Not intended for marine use

Engine Break-In Procedure

Use conventional or break-in oil (non-synthetic) for the first oil change, be sure to check the oil level in the engine and prime the oil system with an engine priming tool.

Engines with flat tappet hydraulic cams only - Run the engine between 2,000 and 2,500 RPM's, with no-load on the engine for the first 30 minutes. This is critical to break in the camshaft.

Drive the vehicle with varying speeds and loads on the engine for the first 30 miles. Be sure not to use a lot of throttle or high RPM. Run five or six medium-throttle accelerations to about 3000 RPM (40 to 50 MPH), then letting off in gear and coasting back down to 20 MPH. Run a couple of hard throttle accelerations up to about 5000 RPM (55 to 60 MPH), then letting off in gear and coasting back down to 20 MPH.

Let the engine cool and change the oil and filter using conventional (non-synthetic) oil and check coolant level, top off if necessary. Drive the next 500 miles normally, without high RPM's (below 5000 RPM), hard use, or extended periods of high loading. Change the oil and oil filter again using conventional (non-synthetic) oil. Keep an eye on oil level during the first thousand or so miles.

It would be suitable to use synthetic motor oil after the second recommended oil change and mileage accumulation.

19433046 supersedes 19432113, 19420597

Emissions Note:

This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.

CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

Proven Stroker Power, Now with Multi-Port Fuel Injection

Chevrolet Performance SP383 EFI Engine is an assembled, ready-to-run 383 stroker with the convenience of a multi-port fuel injection (MPFI) system. Starting with a new, non-remanufactured cast-iron block, the SP383 features a high-performance roller camshaft and lightweight CNC-machined aluminum "Fast-Burn" cylinder heads utilizing aluminum roller rocker arms. The engine also utilizes a throttle body port-style fuel injection system that is bolted to a traditional-style carburated intake manifold. This allows for a top-mounted air cleaner for a classic engine appearance. The vintage look, combined with modern performance and drivability, make the SP383 is a perfect drop-in engine for any classic resto-mod project that originally used a 265-400 ci small block Chevrolet V8 engine.

Connect and Cruise Kits

Chevrolet Performance continues to lead the industry with its unprecedented Connect & Cruise crate powertrain systems - factory-engineered engine and transmission combinations. Chevy Performance engineers matched the engines and transmissions for optimal performance and durability, so you can wring out every horsepower from them with total confidence. The specially calibrated controllers are designed for retrofit installations in older vehicles, for easier and quicker installation and operation without the need for third-party tuning. Each kit delivers a brand-new, fully assembled crate engine, an electronically controlled overdrive transmission, electronic control modules for both, and the engine control hardware to get it all running in your project vehicle. The convenience of a crate engine, the assurance of factory validated performance, and the value of an inclusive package - that's what you get with Chevrolet Performance's Connect & Cruise crate powertrain systems. Detailed instructions outline all the necessary steps. The engineers did all the hard work of designing and calibrating perfectly matched powertrain systems - and they covered them with a 24-month/50,000-mile limited warranty.

GM Warranty

Part TypeEngine

Product LineChevrolet Performance SP383 EFI 383ci/450HP Crate Engine

BrandCHEVROLET PERFORMANCE

Package Height30.0

Package Width37.0

Package Length57.0

Weight577.0 PG

Part CategoryPerformance Parts

Spark Plug Wires IncludedYes

Cylinder Head MaterialAluminum

Air Cleaner IncludedYes