Built 6.6L L8T Engine Packages – From Mild to Wild

Unleash the power of GM’s 6.6L L8T with our professionally built engine packages—tailored to fit your goals, budget, and build style. Whether you're looking for a strong, reliable stock-style motor with key upgrades or a fire-breathing, 1,000+ horsepower beast with a 3.0L Whipple, we’ve got you covered.

Each engine comes with a detailed build sheet, estimated horsepower rating, and parts list so you know exactly what you're getting. Every motor is assembled by pros with proven experience pushing the limits of L8T platforms.

Key Features Across All Variants:

• Built on the reliable 6.6L L8T Gen V platform

• Includes upgraded timing and valley cover plates

• Hand-assembled and precision tested

• Build sheets available for full transparency

• Shipping available or local pick-up

🔧 Choose Your Build:

 6.6L L8T – Street Proven Foundation

• HP Rating: 420HP

• Price: $10,699

• Specs:

  • Stock L8T internals

  • Upgraded timing cover plate

  • Upgraded valley cover plate

  • Stock camshaft

  • Perfect for budget-friendly swaps or factory+ performance

 6.6L L8T – Stage 2 Performance Build

• HP Rating: 475HP

• Price: $12,700

• Specs:

  • Stage 2 BTR L83 Camshaft

  • Matching upgraded springs, pushrods, trunnion kit

  • Timing and valley cover upgrade

  • Front cover upgrade

  • Tuned for aggressive street power with solid reliability

 6.6L L8T – Stage 2 Plus Build w/ Oiling Upgrades

• HP Rating: 475HP

• Price: $13,000

• Specs:

  • Same core setup as Variant 3

  • Adds oil pan upgrade

  • Additional refinement in oiling system for boosted reliability and longevity

  • Built to handle harder abuse and longer runs

 6.6L L8T – 427CI Supercharged Monster Build

• HP Rating: 1025HP

• Price: $40,000

• Specs:

  • Whipple 3.0L Supercharger

  • Forged pistons, rods, and crankshaft

  • Custom camshaft

  • .660 lift dual platinum valve springs

  • 427CI stroker build

  • Coil wire & coil pack upgrades

  • Holley ECU + Injectors

  • Full front drive system: A/C, power steering, water pump, pulleys

  • Fully dressed engine — what you see is what you get

  • Serious power for serious builds — no corners cut