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RAM JET 350

$7,607

MSRP

351 HP

@5000 RPM

12499120

PART NO.

403 LB-FT

@3600 RPM

Modern performance with vintage style

Chevrolet Performance’s unique Ram Jet 350 combines the classic look of the original Rochester mechanical injection system with the dependability and optimized performance of contemporary electronic port fuel injection.

 

We’ve taken our proven 350 Small-Block and topped it with an exclusive port fuel-injection system that emulates the look of Chevy’s factory fuel-injection systems from the 1950s and ’60s. It’s the perfect choice for a resto-mod hot rod from the original Rochester era.

 

We deliver the Ram Jet 350 with the following components to make it easier to install and start:

 

  • Unique intake manifold and plenum that is 9.75 inches tall — plenty of clearance to fit under the hood of most vehicles without modifications
  • MEFI 4 engine controller
  • Wiring harness
  • Detailed instructions

 

The bottom end of the engine is our stout 350 with a brand-new block, a hydraulic roller cam, Vortec iron heads, and a pump-gas-friendly 9.4:1 compression ratio.

Ram Jet 350 Dyno

Ram Jet 350 Image Gallery

Connect & Cruise Powertrain System

Connect & Cruise Crate Powertrain Systems provide factory-matched engine-and-transmission combinations that include specially calibrated controllers and wire harnesses designed for retrofit installations in older vehicles. Connect and Cruise packages are available for a wide variety of crate engines which can be paired with an automatic or manual transmission.

Tech Specs

Part Number: 12499120

Engine Type: Chevy Small-Block V-8

Displacement (cu. in.): 350Bore x Stroke (in.): 4.000 x 3.480

Block: Cast-iron with two-bolt main caps

Crankshaft (P/N 10243068): Cast-iron

Connecting Rods (P/N 10108688): Powdered-metal steel

Pistons (P/N 12571703): Hypereutectic aluminum

Camshaft Type (P/N 14097395): Hydraulic roller

Camshaft Lift (in.): .460 intake / .481 exhaust

Camshaft Duration (@.050 in.): 196° intake / 206° exhaust

Cylinder Heads (P/N 12528913): Vortec iron; 64-cc chambers

Valve Size (in.): 1.940 intake / 1.500 exhaust

Compression Ratio: 9.1 nominal

Rocker Arms (P/N 12367346): Aluminum roller style

Rocker Arm Ratio: 1.6

Recommended Fuel: 92 octane

Ignition Timing: Base 10° BTDC, 32° Total

Maximum Recommended rpm: 5500

Balanced: External

Installation Guides

Find everything from the vital data about your engine’s capabilities to how to install it into your build.

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*The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. Click here to see all Chevrolet vehicles' destination freight charges.

 

Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance Parts may not meet Federal Motor Vehicle Safety Standards and emissions regulations and should not be operated on public roads. Chevrolet Performance customers are responsible for ensuring their use of Chevrolet Performance complies with applicable federal, state, and local laws, regulations, and ordinances. Many parts intended for racing or other “off-highway” use are not designed or tested for crashworthiness or to meet the safety needs of the motoring public, and may adversely affect the original intended performance or handling characteristics of the vehicle. These parts are designed and intended to be used with experts supervising their installation and use, to help assure the proper and safe operation of the vehicle.

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*The Manufacturer's Suggested Retail Price excludes destination freight charge, tax, title, license, dealer fees and optional equipment. Click here to see all Chevrolet vehicles' destination freight charges.

 

Unless specifically noted to the contrary herein, vehicles equipped with Chevrolet Performance Parts may not meet Federal Motor Vehicle Safety Standards and emissions regulations and should not be operated on public roads. Chevrolet Performance customers are responsible for ensuring their use of Chevrolet Performance complies with applicable federal, state, and local laws, regulations, and ordinances. Many parts intended for racing or other “off-highway” use are not designed or tested for crashworthiness or to meet the safety needs of the motoring public, and may adversely affect the original intended performance or handling characteristics of the vehicle. These parts are designed and intended to be used with experts supervising their installation and use, to help assure the proper and safe operation of the vehicle.