Engines • Chevy / GM

Quality by Design. Monster by Nature.

4.96 average • 287 verified reviews MonsterCare Coverage — up to 6 years
Chevy 5.3L reman engine

Chevy 5.3L Engines

Popular truck long blocks with precise clearances and break-in guidance.

Chevy 5.7L reman engine

Chevy 5.7L Engines

Street-proven reliability with QC-driven assembly and dyno testing.

Chevy 6.0L reman engine

Chevy 6.0L Engines

Heavy-duty usage in mind—oil clearances, ring seal, and cooling best practices.

Why Chevy / GM Owners Choose Monster

  • Builds mapped to GM families—5.3L, 5.7L, 6.0L—so you buy exactly what your vehicle needs.
  • Known GM weak points addressed—AFM/DOD lifters (5.3L), oil pickup O-ring & pressure stability, common leak paths—fixed with the right components and QC.
  • Every long block verified—tight measurements, leak-down, and run-in where applicable for ring seal, oil pressure, and temps.
  • Real support and real coverage—clear install docs, easy core return, and MonsterCare warranty options up to 6 years.

Which long block fits my Chevy/GM build?

Stock daily → OE-spec long block. Towing or mild mods → confirm cam profile and compression. Heavier mods → contact us to validate components and calibration.

Do you run-in or dyno the engine?

Procedures vary by family. Where applicable we perform leak-down and run-in verification; details are listed on each engine page.

What should I do during break-in?

Use the specified oil, follow heat-cycle steps, and perform the early filter change. Healthy cooling and fueling protect ring seal.

Is tuning required?

Most stock applications don’t need tuning. For cam/intake/exhaust changes or AFM/DOD deletes, plan on calibration to maintain drivability and durability.

How does the warranty work?

Coverage is model-specific with options up to 6 years. See each product page for exact terms and how to keep coverage active.

*Power, weight, gearing, and tire size affect recommendations. When in doubt, contact our team before ordering.