E85/E86 Z4 Swap Guide
E85 Roadster / E86 Coupe · 2003–2008 — 183 pages · full customer-edition format · explicitly separated E85 roadster and E86 coupe branches, 177 bookmarks and build records
E85/E86 Z4 Swap Guide is a 183-page digital planning reference for a B48/B58 + ZF 8HP conversion into the E85 platform. It is scoped to E85 Roadster / E86 Coupe · 2003–2008, keeps each body branch's evidence separate, and states exactly what it covers — no universal fitment, no guaranteed-start promise, no invented torque or wiring claims.
What's inside
The full E85/E86 Z4 customer-edition swap guide: explicitly separated E85 Roadster and E86 Coupe branches, exact-configuration verification, controller-first integration, measurement and fabrication records, commissioning, and permanent as-built records.
Identity cards, measurements, retained-function contracts, commissioning, and permanent as-built records — print-first worksheets with traceability fields.
Every customer-facing statement is separated into documented evidence vs. the questions your exact build still has to answer.
Related field notes
Questions buyers ask
No universal recipe is established by the research record. The exact configuration controls the answer — the guide starts from an identity sheet.
No. It separates documented evidence from the questions your exact build still has to answer, and tells you what to measure before ordering parts.
No. It is a digital planning reference and record system. Nothing physical ships.