Crate engines are a major part of the weekly dirt economy.

Listings may include Chevrolet Performance 604 and 602 engines, sealed or unsealed packages where legal, fresh engines, used take-outs, backup engines and complete crate packages being sold by teams or shops.

Sellers should identify the exact engine, known seal status, sanction or class history, races or hours since new or freshening, service records when available, included major accessories and whether the engine is represented as ready to run, needs inspection or is being sold for rebuild.

A seal that was acceptable in one program does not guarantee legality somewhere else. Buyers should verify the current rules for the track, class and sanction they intend to race.

Super Late Model Engines

Open Super Late Model engines are among the highest-value pieces in the dirt marketplace.

A buyer may be looking for a fresh primary engine, a used engine for a regional schedule, a backup for a traveling team or a take-out that can be freshened by a trusted builder. At the national level, engine history matters because the cars are being raced hard across tracks ranging from quarter-mile bullrings to places like Eldora, Florence, Knoxville and Lucas Oil Speedway.

Listings should include engine builder, displacement, major configuration, fuel type, known service history, races since freshening, dyno documentation if available, known issues and what major components remain with the engine.

RaceTeams.com should never translate a seller's dyno sheet into a guarantee of future horsepower or reliability.

Modified Engines and Power Packages

Modified engine needs change dramatically by region and sanction.

A Big Block Modified engine, IMCA Modified package, UMP Modified engine and B-Mod or SportMod crate package can be built around very different rules. Sellers should identify the class and rule family the engine was built around instead of relying on a generic "Modified engine" description.

Complete engine packages belong here. Individual headers, carburetors, ignition components, pulleys, pumps and other replacement pieces belong in Dirt Racing Parts.

Dirt Racing Transmissions

Listings may include complete Bert, Brinn, Falcon and other dirt racing transmissions, complete manual gearboxes and transmission packages removed from Late Models, Modifieds and other full-bodied dirt classes.

Sellers should include model, input and output configuration, shifter setup, service history, known leaks or noises, rebuild history and whether the unit came from a running car.

Individual clutches, bellhousings, shifters, bearings, seals and internal service parts belong under Dirt Racing Parts unless they are included as part of the major transmission assembly.

Quick-Change Rear Ends and Complete Rear Axle Assemblies

Complete rear ends are major race assets and belong on this page.

Listings may include complete quick-change rear ends, complete Ford 9-inch rear axle assemblies and other class-specific rear-end packages.

Sellers should identify housing type, width, hubs or brakes if included, center section, known ratios or configuration, service history, damage or repair history and what is included.

Individual gear sets, axles, hubs, bearings, birdcages, trailing-arm brackets and replacement rear-end components belong in Dirt Racing Parts.

Fresh, Used, Take-Out and Core Assemblies

The words "fresh" and "race ready" can mean different things to different sellers.

A strong listing explains what was done, who did it, when it was completed and what has happened since. If the seller does not know the history, say that. A buyer can price an unknown engine or rear end differently than one with invoices, dyno sheets and service records.

Used assemblies can be a practical way to keep a weekly program alive, but buyers should budget for inspection and service rather than assuming the cheapest purchase price is the cheapest path back to the track.

Physical Assembly vs. Engine or Drivetrain Service

This page is for the product itself.

Engine building, freshening, dyno work, machining, carburetor tuning, transmission repair, rear-end service and installation labor belong under Dirt Racing Engine and Drivetrain Services.

A complete engine sitting on a stand for sale belongs here. Paying the builder to freshen the engine belongs in Book.

What Sellers Should Include

A strong listing should include:

• Engine, transmission or rear-end type
• Builder or manufacturer when known
• Class and rule context
• Major specifications
• Seal status when relevant
• Races or hours since new or service
• Rebuild or freshening history
• Dyno documentation when available
• Known leaks, noise, damage or issues
• Exactly what major components are included
• Whether the assembly ran when removed
• Whether inspection or service is recommended
• Shipping, freight or pickup requirements
• Clear photos of identification marks and condition

What Buyers Should Review

Before purchasing, review rule fit, service history, documentation, condition, compatibility, installation requirements, freight risk and the cost of inspection or freshening before use.

RaceTeams.com does not verify horsepower, torque, dyno results, seal status, class legality, rule compliance, service history, mechanical condition, compatibility or race readiness.

Related Dirt Racing Categories

• Dirt Race Cars and Chassis
• Dirt Racing Parts
• Dirt Racing Equipment
• Dirt Racing Engine and Drivetrain Services
• Dirt Racing Setup and Technical Services