Compressor housing and wheel. Turbine housing and wheel. A/R ratios. Scroll design and its impact on boost.

Role of the wastegate in regulating boost. Differences in internal and external types. Wastegate failure symptoms. Popular brands.

Function of each. Sound and performance implications. BOV tuning and recirculation.

Spool characteristics. Oil pressure demands. Longevity and rebuild cost. Ideal use-cases.

Cooling efficiency. Pressure drop considerations. Mounting positions. Size, piping, and thermal conductivity.

Oil feed and return. Coolant lines (for water-cooled turbos). Signs of oil failure. Filters and oil restrictors.

Performance implications. Heat management. Crack resistance. Compatibility with different turbos.

Performance implications. Heat management. Crack resistance. Compatibility with different turbos.