SCG M-Tier
Reinforced Foundation. Unlocked Potential.
The SCG M-Tier addresses the most critical weakness in McLaren's M838T and M840T platforms: the factory connecting rods. By reinforcing the foundation where it matters most, the M-Tier delivers increased power capability, uncompromising reliability, and long-term durability — without sacrificing the drivability and character that make these cars exceptional.
Engineered Excellence
Reinforced Connecting Rods
Purpose-built rods engineered to withstand elevated cylinder pressures and sustained high-rpm abuse that factory rods cannot survive.
Bearing & Reliability Upgrades
Upgraded bearings and clearancing to eliminate common failure points and extend engine life well beyond factory expectations.
Increased Power Capability
A stronger foundation unlocks headroom for modest power gains and future upgrades without compromising structural integrity.
Factory Drivability Preserved
Retains the throttle response, character, and everyday usability that define the McLaren experience.
- Factory-spec teardown & full inspection
- Crack testing & measurement of every component
- SCG reinforced connecting rod set
- Upgraded bearing selection & clearancing
- Precision block honing & head surfacing
- Hand assembly by master builders
- Documented build sheet with all clearances
- Break-in cycle & final validation
The Build Process
Every SCG M-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.