Exhaust · 993-EXH-HEAT-EXCHANGER-PAIR-PET-0001
993 Turbo exhaust heat exchangers (manifolds), left and right - PET-transcribed identity
ConceptNot authorised until engineering review
Identity-only catalogue record for the two Turbo exhaust heat exchangers (exhaust manifolds with integrated catalysis in the Turbo line), transcribed per-line from the local PET transcriptions: illustration 202-10 (exhaust system, Turbo) position 1 left 993 211 039 55 and position 2 right 993 211 040 55, confirmed independently by two Porsche PET catalogue transcriptions (KAT 17 and Porsche Classic KAT 517 USA, which lists the -56 suffixes). The record carries part number, group, position, applicability and catalogue context only: no dimensions, materials, wall thicknesses, flow data or geometry are claimed. Quantity per car is not carried by the local transcription; the engine uses one unit per bank (2 per car).
The design
- Vehicle
- Porsche 993, 1995–1998
- Variants
- 993 Turbo
- Porsche part numbers
- 99321103955, 99321104055, 99321103956, 99321104056
- Category
- Exhaust manifold heat exchanger
- Geometry basis
- Estimated
- Preferred process
- Not chosen yet
- Other candidate processes
- CNC machining
- Material
- unknown (an IN625 aftermarket offer exists, see 993-ENG-EXHAUST-MANIFOLD-IN625-F0-0001)
- Material standard
- not recorded
Known limits
- Identity only: the PET transcriptions carry part number, group, position and description, no dimensions, tolerances, materials or geometry.
- KAT 17 lists the -55 suffix (revision A), KAT 517 lists -56; the local data do not document the supersession relation, both suffixes are recorded without claiming replacement.
- Quantity per car is not carried by the local transcription; 2 per car reflects the two-bank engine, not a transcribed field.
- Wastegate actuator part numbers do not appear in any local PET transcription line and remain unsourced.
What a supplier would have to provide
- Professional engineering review before any manufacturing claim
- Dimensional inspection on a real part before any geometry work
Sources
- Porsche Fanatics factory catalogue transcription, PET illustration 202-10 lines (993) · read
202-10 lines: pos 1 = 993 211 039 55 (revision A) and pos 2 = 993 211 040 55 (revision A) from pet-993-pdf-rsworkshop (KAT 17, PDF p. 86); same positions also present from pet-classic-993 (KAT 517 USA, PDF p. 141) with the -56 suffixes. Group 'exhaust system'.
- Porsche PET 993 - Turbo heat exchangers illustration 202-10 (Porsche Classic KAT 517) · read
no dimensions.
- Porsche 993 Workshop Manual - Exhaust system torque page 61 · read
catalytic converter or front muffler 23 Nm; ball clamps 25-30 Nm; O2 sensor M18x5 50-60 Nm. Interfaces and loads context only.