SCG O-Tier
Extreme Capability. Zero Compromise.
The SCG O-Tier is our ultimate high-performance engine solution — built for those who demand nothing less than extreme capability. Engineered for maximum horsepower, track-level performance, and uncompromising durability, the O-Tier is designed to thrive under the most demanding conditions. Available as a complete, fully assembled performance engine, long block, or purpose-built McLaren engine rebuild.
Engineered Excellence
Maximum Horsepower
Engineered from the ground up for serious power — the foundation to chase numbers the factory platform was never built to hold.
Track-Level Performance
Purpose-built to survive the sustained abuse of track use, high boost, and elevated cylinder pressures lap after lap.
Complete or Long Block
Available as a complete, fully assembled performance engine, a long block, or a purpose-built McLaren engine rebuild — your choice.
Built To SCG Standards
Every O-Tier is engineered with precision and assembled to SCG standards — the most exacting build we offer.
- Full teardown, inspection & documentation
- In-house machining & precision balancing
- SCG ultimate-spec component package
- Forged/heavy-duty rotating assembly
- Advanced porting & flow engineering
- Track-spec bearing & clearancing package
- Master-builder hand assembly
- Full dyno tuning, validation & track prep
The Build Process
Every SCG O-Tier engine follows a meticulous, documented process.
Teardown & Inspection
Full disassembly, crack testing, and measurement of every component to factory specs.
Machining & Prep
Block honing, head surfacing, porting, and balancing — all done in-house.
Assembly & Clearancing
Hand-assembled by master builders. Every clearance measured and documented.
Dyno & Validation
Break-in cycle, dyno tuning, and final power validation before delivery.