Knowledge is power - Especially when you're trying to keep the Exhaust and Heating System alive on your Bay-Window, Breadloaf Volkswagen Bus. While most of the items on this page are available new from various vendors on the web and in the VW mags, some are are only available used in your Friendly VW Parts Recycling Yard (FVWPRY). But, what to look for? What's the right part? How can you tell if you're getting the right piece? Hopefully this page with it's pictures and listings make the job easier for you.
Part Numbers Shown Are OE Volkswagen. Some Aftermarket Vendor's Part Numbers may be different.
Exhaust - Muffler & Heater 1972-1974
Exhaust - Muffler & Heater 1975-1978
Exhaust - Muffler & Heater 1979 California Models
Exhaust - Muffler & Heater 1979 Federal Models
Heater Blower, Hose & Air Tube
| Ref. | Part Number | Description |
|---|---|---|
| A. | 071-251-053E | Muffler, Without EGR Port 1972 Note: 74 Models with EGR Port on Left Heater Box uses this Muffler as well |
| A. | 071-251-053F | Muffler, With EGR Port 73-74 |
| B. | 021-251-185F | Tailpipe |
| C. | 025-251-261 | Gasket, Muffler to Heater Box Flange |
| D. | 025-251-235 | Gasket, Tailpipe |
| Ref. | Part Number | Description |
|---|---|---|
| A. | 021-256-091M | Manifold/Heater Box, Left Without EGR Port on Manifold/Heater Box |
| A. | 021-256-091J | Manifold/Heater Box, Left 1974 Models with EGR Port on Manifold/Heater Box |
| B. | 021-256-092AC | Manifold/Heater Box, Right 72-74 |
| C. | 021-256-251A | Copper Gasket, Manifold to Head,1700 72-74 |
| C. | 039-256-251 | Copper Gasket, Manifold to Head, 1800 1974 |
| D. | N 014 427 7 | Stud, Exhaust Port, 1700 72-74 |
| (D.) | N 014 684 1 | Stud, Exhaust Port 1800 1974 (Special 8x9x56) |
| E. | 021-256-205K or L | Heater Control/Flap Box, Left |
| E. | 021-256-206K or L | Heater Control/Flap Box, Right |
| F. | 311-129-777 | Swivel Pin/Clamp, Heater Cable |
Some items shown in the next two pictures are becoming VERY difficult to obtain in good used, much less new. The manifolds and pipes are long ago discontinued items. Did you know that many Bus owners are now retro-fitting the 72-74 Bus exhaust system to their 75-78's? A very workable retro-fit. Just be sure to use the 039-256-251 Copper Exhaust Gaskets from the Head to the Heater Box Manifold Pipes for proper sealing. For more info, go to the Exhaust - Muffler & Heater 1972-1974 Section for all of the necessary parts listings. In addition, the Heater Control Flap/Boxes on the 72-74 are the same as your 75-78, so you don't have to replace these.
Note: This retro-fit is NOT legal for street use, especially in areas of the US that still have periodic emission-control (smog) checks, especially those requiring the installation of the Catalytic Converter. Check with Local Laws first before performing this retro-fit.
| Ref. | Part Number | Description |
|---|---|---|
| A. | 071-251-053C | Muffler |
| B. | 021-251-521 | Muffler Strap |
| C. | 021-251-541 | Connecting Pipe From Elbow To Muffler Note: This pipe is only used on 75-78 models NOT originally equipped with a Catalytic Converter. Not Legal For Street Use On Models Originally Equipped With Catalytic Converter. Not Legal For Street Use On California Models 75-78. |
| D. | 021-251-185F | Tailpipe |
| E. | 023-298-051 | Exhaust Donut/Clamp Kit - Connects Pipe or Converter to Muffler |
| F. | 025-251-235 | Gasket Only, Tailpipe |
| Ref. | Part Number | Description |
|---|---|---|
| A. | 021-251-551 | Exhaust Manifold, Left |
| B. | 021-251-552 | Exhaust Manifold, Right |
| C. | 039-256-251 | Copper Gasket, Manifold to Head, 1800 1975, 2000 76-78 |
| D. | 043-251-509 | Exhaust Triangle Gasket |
| E. | 021-251-201 | Exhaust "Afterburner" Pipe, Left or Right Side |
| F. | 021-256-091T | Heater Box, Left |
| G. | 021-256-092T | Heater Box, Right |
| H. | 021-251-501 | Exhaust Crossover Pipe With PreHeat Tube 75-Mid 76 To VIN 2x6 2070 000 |
| J. | 021-251-501A | Exhaust Crossover Pipe Mid 76-78 From VIN 2x6 2070 001 |
| K. | 021-251-531 | Exhaust Elbow |
| L. | 070-251-235 | Gasket, Elbow to Crossover Pipe |
| M. | 021-256-205K or L | Heater Control/Flap Box, Left |
| M. | 021-256-206K or L | Heater Control/Flap Box, Right |
| N. | 311-129-777 | Swivel Pin/Clamp, Heater Cable |
| P. | N 014 684 1 | Stud, Exhaust Port (Special 8x9x56) |
| Ref. | Part Number | Description |
|---|---|---|
| A. | 071-251-053C | Muffler |
| B. | 021-251-521 | Muffler Strap |
| C. | See Note | Not Applicable to California System |
| D. | 021-251-185F | Tailpipe |
| E. | 023-298-051 | Exhaust Donut/Clamp Kit - Connects Pipe to Muffler |
| F. | 025-251-235 | Gasket Only, Tailpipe |
| Ref. | Part Number | Description | Price |
|---|---|---|---|
| A. | 039-251-551 | Exhaust Manifold, Left Becoming Very Rare! - Stainless Steel | |
| B. | 039-256-091D | Heater Box, Left | |
| C. | 029-256-092C | Heater Box, Right | |
| D. | 029-256-251A | Exhaust Gasket, Manifold or Heater Box to Head Cylinder 1 and 4 | |
| D. | 029-256-252A | Exhaust Gasket, Manifold or Heater Box to Head Cylinder 2 and 3 | |
| E. | 043-251-509 | Exhaust Triangle Gasket Connects Crossover Pipe to Left Manifold and both sides of Catalytic Converter | |
| F. | 025-251-261 | Exhaust Gasket, Right Heater Box to Crossover Pipe | |
| G. | 039-251-497A | Exhaust Crossover Pipe | |
| H. | 021-256-205K or L | Heater Control/Flap Box, Left | |
| H. | 021-256-206K or L | Heater Control/Flap Box, Right | |
| J. | 311-129-777 | Swivel Pin/Clamp, Heater Cable | |
| ** | N 014 684 1 | Stud, Exhaust Port - Head to Manifold or Heater Box (Special 8x9x56)(Not Shown) |
| Ref. | Part Number | Description |
|---|---|---|
| A. | 071-251-053C | Muffler |
| B. | 021-251-521 | Muffler Strap |
| C. | 021-251-541 | Connecting Pipe From Elbow To Muffler Note: This pipe is only used on 1979 models NOT originally equipped with a Catalytic Converter. Not Legal For Street Use On Models Originally Equipped With Catalytic Converter. Not Legal For Street Use On California 1979 Models |
| D. | 021-251-185F | Tailpipe |
| E. | 023-298-051 | Exhaust Donut/Clamp Kit - Connects Pipe or Converter to Muffler |
| F. | 025-251-235 | Gasket Only, Tailpipe |
| Ref. | Part Number | Description | Price |
|---|---|---|---|
| A. | 039-256-091C | Heater Box, Left | |
| B. | 029-256-092C | Heater Box, Right | |
| C. | 039-251-497 | Exhaust Crossover Pipe | |
| D. | 029-256-251A | Exhaust Gasket, Manifold or Heater Box to Head Cylinder 1 and 4 | |
| D. | 029-256-252A | Exhaust Gasket, Manifold or Heater Box to Head Cylinder 2 and 3 | |
| E. | 025-251-261 | Gasket Only, Heater Box Flange to Crossover Pipe | $3.75ea |
| F. | 411-298-009 | Gasket Set With Hardware, Heater Box Flange to Crossover Pipe (does both sides) | |
| G. | 043-251-509 | Exhaust Triangle Gasket, Crossover Pipe to Catalytic Converter or Connecting Pipe | |
| H. | N 014 684 1 | Stud, Exhaust Port - Head to Manifold or Heater Box (Special 8x9x56) | |
| J. | 021-256-205K or L | Heater Control/Flap Box, Left | |
| J. | 021-256-206K or L | Heater Control/Flap Box, Right | |
| K. | 311-129-777 | Swivel Pin/Clamp, Heater Cable |
| Ref. | Part Number | Description | Price |
|---|---|---|---|
| A. | 411-963-007B | Blower Motor Only | |
| B. | 261-261-195A | Fan Housing | |
| C. | 211-261-269D | Mounting Bracket Assembly | |
| D. | 021-256-331A | Hot Air Tube, Left 72-78 & 1979 Federal Models | |
| D. | 039-256-331A | Hot Air Tube, Left 1979 California Models | |
| D. | 021-256-332A | Hot Air Tube, Right 72-74 & 1979 All Models | |
| D. | 021-256-332B | Hot Air Tube, Right 75-78 | |
| E. | 211-261-235 | Fresh Air Hose, Left | |
| F. | 211-261-236A | Fresh Air Hose, Right |