ram jet 502

RAM JET 502

An underhood statement

The Ram Jet 502 blends the legendary torque and performance of the Big-Block with a modern port fuel injection system and tunnel ram-style high-rise intake manifold.

PART NO. 12499121

WhyBuy

502 HP @5300 RPM

WhyBuy

568 LB-FT @3600 RPM

It’s all about torque 

The unique Ram Jet fuel injection system stands 11 inches tall at its highest point and consists of a two-piece manifold/plenum assembly, eight injectors, a throttle body, and an updated MEFI 4 controller.

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.  

CHEVROLET PERFORMANCE BENEFITS

CONNECT & CRUISE CRATE POWERTRAIN SYSTEM

CHEVROLET PERFORMANCE ENGINE (PART-ONLY)

CHEVROLET PERFORMANCE TRANSMISSION (PART-ONLY)

Limited Warranty-Backed by Chevrolet

24 Months/50,000 Miles

(E-Rod: 36 Months/50,000 Miles)

24 Months/50,000 Miles

(E-Rod: 36 Months/50,000 Miles)

12 Months/Unlimited Miles

Designed, engineered, and tested to stringent Chevrolet specifications

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Installation Kit included for ease of installation

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Packaged solution with conveniently matched engine, transmission, torque converter, and transmission controller to fit your customized needs

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Simplified part-sourcing process, eliminating the need to independently source compatible components

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Factory tuned and calibrated to fit your unique application

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Eligible for $500 or $750 mail-in rebate  See Rebate website for details

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CONNECT & CRUISE CRATE POWERTRAIN SYSTEM

CHEVROLET PERFORMANCE BENEFITS

CONNECT & CRUISE CRATE POWERTRAIN SYSTEM

Limited Warranty-Backed by Chevrolet

24 Months/50,000 Miles

(E-Rod: 36 Months/50,000 Miles)

Designed, engineered, and tested to stringent Chevrolet specifications

Check

Installation Kit included for ease of installation

Check

Packaged solution with conveniently matched engine, transmission, torque converter, and transmission controller to fit your customized needs

Check

Simplified part-sourcing process, eliminating the need to independently source compatible components

Check

Factory tuned and calibrated to fit your unique application

Check

Eligible for $500 or $750 mail-in rebate  See Rebate website for details

Check

CHEVROLET PERFORMANCE ENGINE (PART-ONLY)

CHEVROLET PERFORMANCE BENEFITS

CHEVROLET PERFORMANCE ENGINE (PART-ONLY)

Limited Warranty-Backed by Chevrolet

24 Months/50,000 Miles

(E-Rod: 36 Months/50,000 Miles)

Designed, engineered, and tested to stringent Chevrolet specifications

Check

Installation Kit included for ease of installation

Check

Packaged solution with conveniently matched engine, transmission, torque converter, and transmission controller to fit your customized needs

Xmark

Simplified part-sourcing process, eliminating the need to independently source compatible components

Xmark

Factory tuned and calibrated to fit your unique application

Check

Eligible for $500 or $750 mail-in rebate  See Rebate website for details

Xmark

CHEVROLET PERFORMANCE TRANSMISSION (PART-ONLY)

CHEVROLET PERFORMANCE BENEFITS

CHEVROLET PERFORMANCE TRANSMISSION (PART-ONLY)

Limited Warranty-Backed by Chevrolet

12 Months/Unlimited Miles

Designed, engineered, and tested to stringent Chevrolet specifications

Check

Installation Kit included for ease of installation

Check

Packaged solution with conveniently matched engine, transmission, torque converter, and transmission controller to fit your customized needs

Xmark

Simplified part-sourcing process, eliminating the need to independently source compatible components

Xmark

Factory tuned and calibrated to fit your unique application

Check

Eligible for $500 or $750 mail-in rebate  See Rebate website for details

Xmark

Parts and labor warranty when installed by a GM Dealer or qualified installing independent Service Center (ISC) or when sold over the counter and REPAIRED by a GM Dealer or qualifying ISC. Parts only when consumer repaired or installed in non-highway application. Coverage limited to defects in material and/or workmanship of the specific part only. Warranty valid when all required components are installed on the same vehicle and purchased on one invoice.

 

††See participating U.S. dealer or authorized powertrain reseller for details and rebate form, which must be postmarked by 11/30/19. Rebate offer not available with other offers. Rebate form and details available at chevrolet.com/performance/offers. Allow 6 to 8 weeks for delivery of debit card. Offer valid 11/1/18 to 10/31/19.

Installation Guides

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

Ram Jet 502 Tech Specs

  • Part Number: 12499121
  • Engine Type: Chevy Big-Block V-8
  • Displacement (cu. in.): 502
  • Bore x Stroke (in.): 4.470 x 4.000
  • Block (P/N 19170540): Cast-iron with four-bolt main caps
  • Crankshaft (P/N 10183723): Forged steel
  • Connecting Rods (P/N 19170198): Forged steel, shot peened
  • Pistons (P/N 12533507): Forged aluminum
  • Camshaft Type (P/N 12366543): Hydraulic roller
  • Camshaft Lift (in.): .527 intake / .544 exhaust
  • Camshaft Duration (@.050 in.): 224° intake / 234° exhaust
  • Cylinder Heads (P/N 12363390): Aluminum oval port; 110-cc chambers
  • Valve Size (in.): 2.250 intake / 1.880 exhaust; stainless steel
  • Compression Ratio: 9.6:1
  • Rocker Arms (P/N 12368082): Stamped steel
  • Rocker Arm Ratio: 1.7:1
  • Distributor (P/N 1104060): HEI type
  • Throttle Body (P/N 17113524): Included
  • Water Pump (P/N 19168602): Aluminum, short-style
  • Flexplate (P/N 10185034): 14"
  • Recommended Fuel: Premium pump
  • Ignition Timing: 35° Total @ 4,000
  • Maximum Recommended rpm: 5800
  • Balanced: External

Recommended Engine Oil

Mobil 1 is now The Official Motor Oil of Chevrolet Performance. With Mobil 1 full synthetic motor oil for street engines and Mobil 1 Racing oil for race engines, Mobil 1 protects all Chevrolet Performance crate engines.


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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.

  • 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.

  • EPA-estimated 53-mile range based on 106 MPGe combined city/highway (electric); 367-mile extended range based on 42 MPG combined city/highway (gas). Your actual range may vary based on several factors, including temperature, terrain and driving technique.

  • 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.

  • MyLink functionality varies by model. Full functionality requires compatible Bluetooth and smartphone, and USB connectivity for some devices.

  • Do not use summer-only tires in winter conditions, as it would adversely affect vehicle safety, performance and durability. Use only GM-approved tire and wheel combinations. Unapproved combinations may change the vehicle’s performance characteristics. For important tire and wheel information, go to my.chevrolet.com/learnAbout/chevrolettires or see your dealer.

  • Dependability based on longevity: 1987 – July 2017 full-size pickup registrations.

  • With rear seats folded. Cargo and load capacity limited by weight and distribution

  • EPA-estimated 29 MPG city/39 highway with 5-speed manual transmission and 30 MPG city/38 highway with available Continuously Variable Transmission

  • EPA estimated with 3.6L V6 engine.

  • Cargo and load capacity limited by weight and distribution.

  • Chevrolet Infotainment System functionality varies by model. Full functionality requires compatible Bluetooth and smartphone, and USB connectivity for some devices.

  • Vehicle user interface is a product of Apple and its terms and privacy statements apply. Requires compatible iPhone and data plan rates apply. Apple CarPlay is a trademark of Apple Inc. Siri, iPhone and iTune are trademarks of Apple Inc., registered in the U.S. and other countries.

  • Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See your vehicle Owner’s Manual for more information. Airbag inflation can cause severe injury or death to anyone too close to the airbag when it deploys. Be sure every occupant is properly restrained.

     

  • EPA-estimated MPG city/highway: Sonic Sedan with 6-speed manual transmission 27/38; with 6-speed automatic transmission 26/34; Sonic Hatchback with 6-speed manual transmission 26/35; with 6-speed automatic transmission 26/34.

  • Always use seat belts and child restraints. Children are safer when properly secured in a rear seat in the appropriate child restraint. See your vehicle Owner’s Manual for more information.

  • Connected Services include navigation services and Remote Access Plan, and 1 month/3 GB of 4G LTE data (whichever comes first) from vehicle delivery date. Services are subject to User Terms and limitations. Certain services require working electrical system, cell service and GPS signals. OnStar links to emergency services. Visit onstar.com for more details.

  • Model year 2018 and newer vehicles include: 1 month of OnStar Safety & Security Plan and 1 month of Chevrolet Connected Services which include navigation services, Remote Access Plan and 1 month or 3 gigabytes of 4G LTE data (whichever comes first) from vehicle delivery date. Services are subject to user terms and limitations. Visit onstar.com for more details. Data plans offered by AT&T. Availability subject to change.

  • Connected Services include navigation services and Remote Access Plan, and 1 month/3 GB of 4G LTE data (whichever comes first) from vehicle delivery date. Data plan offered by AT&T. Services subject to user terms and limitations. Certain services require working electrical system, cell service, and GPS signal. OnStar links to emergency services.  Visit onstar.com for more details.

  • If you decide to continue service after your trial, the subscription plan you choose will automatically renew thereafter and you will be charged according to your chosen payment method at then-current rates. Fees and taxes apply. To cancel you must call SiriusXM at 1-866-635-2349. See SiriusXM Customer Agreement for complete terms at siriusxm.com. All fees and programming subject to change. Sirius, XM, SiriusXM and all related marks and logos are trademarks of Sirius XM Radio Inc.

  • EPA-estimated 238-mile EV range. Your actual range may vary based on several factors including temperature, terrain, and driving technique.

  • Read your vehicle owner's manual for important feature limitations and information.

  • Read your vehicle owner's manual for important feature limitations and information.

  • Read the vehicle owner's manual for important feature limitations and information.

  • EPA-estimated MPG highway for Cruze Sedan with 1.4L 4-cylinder engine.

  • Cargo space for Cruze Hatch with rear seats folded. Cargo and load capacity limited by weight and distribution.

  • EPA-estimated 37 MPG highway for Cruze Premier Hatchback.

  • If you decide to continue service after your trial, your selected subscription plan will automatically renew thereafter. You will be charged at then-current rates. Fees and taxes apply. To cancel you must call SiriusXM at 1-866-635-2349. See SiriusXM Customer Agreement for complete terms at siriusxm.com. All fees and programming subject to change. ©2018 Sirius XM Radio Inc. All rights reserved.

  • EPA-estimated 53-mile range based on 106 MPGe combined city/highway (electric); 367-mile extended range based on 42 MPG combined city/highway (gas). Your actual range may vary based on several factors, including temperature, terrain and driving technique.

  • EPA-estimated 53-mile range based on 106 MPGe combined city/highway (electric); 367-mile extended range based on 42 MPG combined city/highway (gas). Your actual range will vary based on several factors including temperature, terrain and driving conditions.

  • Read the vehicle owner's manual for important feature limitations and information.

  • Visit my.chevrolet.com/learn for vehicle and smartphone compatibility.

  • Available late 2018.

  • Read the vehicle Owner's Manual for important feature limitations and information.

  • Requires available Performance Exhaust or Z51 Performance Package.

  • Requires available Performance Exhaust or Z51 Performance Package.

  • Before you buy a vehicle or use it for trailering, carefully review the Trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • EPA-estimated 28 City/39 Hwy MPG

  • With second row seats folded flat. Cargo and load capacity limited by weight and distribution.

  • 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.

  • Read the vehicles Owner’s Manual for more important feature limitations and information.

  • Does not detect people or items. Always check rear seat before exiting.

  • Vehicle user interface is a product of Google, and its terms and privacy statements apply. Requires the Android Auto app on Google Play and an Android compatible smartphone running Android (TM) 5.0 Lollipop or higher. Data plan rates apply. Android Auto is a trademark of Google LLC.

  • Service varies with conditions and location. Requires active service plan and paid AT&T Data plan. See onstar.com for details and limitations.

  • Premier shown seats seven. Standard on L, LS. Available on LT.

  • EPA-estimated with available 3.6L engine (FWD).

  • With second and third row seats folded flat. Cargo and load capacity limited by weight and distribution.

  • Read the vehicle owner's manual for important feature limitations and information.

  • The system wirelessly charges one mobile device. Some devices require an adaptor or back cover. To check for phone or other device compatibility, visit my.chevrolet.com/learn for details.

  • With rear seats folded. Cargo and load capacity limited by weight and distribution.

  • With 5.3L EcoTec 3 engine. EPA-estimated MPG city/highway: Suburban 2WD 15/22, 4WD14/21.

  • Based on GM Large SUV segment. With 5.3L EcoTec 3 engine. EPA-estimated MPG city/highway: Tahoe 2WD 15/22, 4WD 15/21.

  • With second and third row seats folded flat. Cargo and load capacity limited by weight and distribution.

  • Available on all trims and standard on RS and Premier including 3.6L V6 engine.

  • Requires AWD model. Before you buy a vehicle or use it for trailering, carefully review the Trailering section of the Owner’s Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • Chevrolet Infotainment System functionality varies by model. Full functionality requires compatible Bluetooth and smartphone, and USB connectivity for some devices. Map Coverage available in the United States, Puerto Rico and Canada.

  • Dependability based on longevity: 1987–July 2017 full-size pickup registrations.

  • Model year 2018 and newer vehicles include: 1 month of OnStar Safety & Security Plan and 1 month of Chevrolet Connected Services which include navigation services, Remote Access Plan, and 1 month or 3 gigabytes of 4G LTE data (whichever comes first) from vehicle delivery date. Services are subject to user terms and limitations. Visit onstar.com for more details. Data plans offered by AT&T. Availability subject to change.

  • Read the vehicles Owner's Manual for more important feature limitations and information.

  • Vehicle user interface is a product of Google, and its terms and privacy statements apply. Requires the Android Auto app on Google Play and an Android compatible smartphone running Android(TM) 5.0 Lollipop or higher. Data plan rates apply. Android Auto is a trademark of Google LLC.

     

  • 308 horsepower with standard 3.6L V6 engine.

  • Before you buy a vehicle or use it for trailering, carefully review the Trailering section of the Owner's Manual. The weight of passengers, cargo and options or accessories may reduce the amount you can tow.

  • With available Duramax 6.6L Turbo-Diesel V8.

  • Requires Vortec 6.0L V8 engine

  • Express Cargo Van with extended wheelbase. Cargo and load capacity limited by weight and distribution.

  • Equipment from independent suppliers is not covered by the GM New Vehicle Limited Warranty. GM is not responsible for the safety or quality of independent supplier alterations.

  • Requires available 6.0L V8 engine.

  • 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.

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