SixFix - Porsche Service Shop - Cornelius Goeritz
Cornelius Goeritz
Porsche Specialist • Service • Rebuilds • Pre-Purchase Inspections
Cornelius Goeritz is the founder of SIXFIX, a Porsche-focused service shop dedicated to keeping enthusiast cars reliable, safe, and performing at their best.
While SIXFIX specializes in aircooled 911s, the shop services everything from 356 to modern 992 models (including Cayenne Diesel)—from routine oil changes to full transmission rebuilds and everything in between.
With experience at Porsche Classic, Mezgerwerk, Porsche Motorsport NA, and Canepa, Cornelius also provides expert-level service on select special Porsche models.
About SIXFIX
SIXFIX focuses on preventative maintenance and proper diagnostics to keep Porsches on the road. Addressing issues early helps owners avoid larger failures and protect long-term value.
Core Services
Service & Maintenance
Regular inspections and preventative service for aircooled and watercooled Porsches.
Suspension & Brakes
Brake system rebuilds and suspension upgrades to improve safety and performance.
Transmission
Transmission rebuilds and upgrades to keep your Porsche running strong.
Intake Systems
Repair and tuning of carburetors, MFI, CIS, Motronic, plus EFI conversions.
Aircooled Models
356, 912, 914, 930 and all classic aircooled Porsche platforms.
Pre-Purchase Inspection (PPI)
Comprehensive inspection reports, paint thickness checks, and model-specific engine tests.
Watercooled Service
Maintenance and minor repairs for modern Porsche models.
Special Porsche Models
Service and repairs for rare models such as 959, 906, and others.