This Page Was Revised November 26, 2000


Bus 1700/1800/2000 Exhaust/Heater 1972-1979


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.


Selectable Index (Alphabetical)

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


Muffler, Exhaust and Heater 1972-1974

Muffler & Tailpipe
Ref.Part NumberDescription
A.071-251-053EMuffler, Without EGR Port 1972
Note: 74 Models with EGR Port on Left Heater Box uses this Muffler as well
A.071-251-053FMuffler, With EGR Port 73-74
B.021-251-185FTailpipe
C.025-251-261Gasket, Muffler to Heater Box Flange
D.025-251-235Gasket, Tailpipe

Manifold & Heater System
Ref.Part NumberDescription
A.021-256-091MManifold/Heater Box, Left
Without EGR Port on Manifold/Heater Box
A.021-256-091JManifold/Heater Box, Left
1974 Models with EGR Port on Manifold/Heater Box
B.021-256-092ACManifold/Heater Box, Right 72-74
C.021-256-251ACopper Gasket, Manifold to Head,1700 72-74
C.039-256-251Copper Gasket, Manifold to Head, 1800 1974
D.N 014 427 7Stud, Exhaust Port, 1700 72-74
(D.)N 014 684 1Stud, Exhaust Port 1800 1974 (Special 8x9x56)
E.021-256-205K or LHeater Control/Flap Box, Left
E.021-256-206K or LHeater Control/Flap Box, Right
F.311-129-777Swivel Pin/Clamp, Heater Cable


Muffler, Exhaust and Heater 1975-1978

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.

Muffler & Tailpipe
Ref.Part NumberDescription
A.071-251-053CMuffler
B.021-251-521Muffler Strap
C.021-251-541Connecting 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.021-251-185FTailpipe
E.023-298-051Exhaust Donut/Clamp Kit - Connects Pipe or Converter to Muffler
F.025-251-235Gasket Only, Tailpipe

Manifolds & Heater System
Ref.Part NumberDescription
A.021-251-551Exhaust Manifold, Left
B.021-251-552Exhaust Manifold, Right
C.039-256-251Copper Gasket, Manifold to Head, 1800 1975, 2000 76-78
D.043-251-509Exhaust Triangle Gasket
E.021-251-201Exhaust "Afterburner" Pipe, Left or Right Side
F.021-256-091THeater Box, Left
G.021-256-092THeater Box, Right
H.021-251-501Exhaust Crossover Pipe With PreHeat Tube 75-Mid 76
To VIN 2x6 2070 000
J.021-251-501AExhaust Crossover Pipe Mid 76-78
From VIN 2x6 2070 001
K.021-251-531Exhaust Elbow
L.070-251-235Gasket, Elbow to Crossover Pipe
M.021-256-205K or LHeater Control/Flap Box, Left
M.021-256-206K or LHeater Control/Flap Box, Right
N.311-129-777Swivel Pin/Clamp, Heater Cable
P.N 014 684 1Stud, Exhaust Port (Special 8x9x56)


Muffler, Exhaust and Heater California 1979 Only

Muffler & Tailpipe
Ref.Part NumberDescription
A.071-251-053CMuffler
B.021-251-521Muffler Strap
C.See NoteNot Applicable to California System
D.021-251-185FTailpipe
E.023-298-051Exhaust Donut/Clamp Kit - Connects Pipe to Muffler
F.025-251-235Gasket Only, Tailpipe

Manifold & Heater System
Ref.Part NumberDescriptionPrice
A.039-251-551Exhaust Manifold, Left
Becoming Very Rare! - Stainless Steel
B.039-256-091DHeater Box, Left
C.029-256-092CHeater Box, Right
D.029-256-251AExhaust Gasket, Manifold or Heater Box to Head
Cylinder 1 and 4
D.029-256-252AExhaust Gasket, Manifold or Heater Box to Head
Cylinder 2 and 3
E.043-251-509Exhaust Triangle Gasket
Connects Crossover Pipe to Left Manifold and both sides of Catalytic Converter
F.025-251-261Exhaust Gasket, Right Heater Box to Crossover Pipe
G.039-251-497AExhaust Crossover Pipe
H.021-256-205K or LHeater Control/Flap Box, Left
H.021-256-206K or LHeater Control/Flap Box, Right
J.311-129-777Swivel Pin/Clamp, Heater Cable
**N 014 684 1Stud, Exhaust Port - Head to Manifold or Heater Box
(Special 8x9x56)(Not Shown)


Muffler, Exhaust and Heater Federal 1979 Only

Muffler & Tailpipe
Ref.Part NumberDescription
A.071-251-053CMuffler
B.021-251-521Muffler Strap
C.021-251-541Connecting 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.021-251-185FTailpipe
E.023-298-051Exhaust Donut/Clamp Kit - Connects Pipe or Converter to Muffler
F.025-251-235Gasket Only, Tailpipe

Manifold & Heater System
Ref.Part NumberDescriptionPrice
A.039-256-091CHeater Box, Left
B.029-256-092CHeater Box, Right
C.039-251-497Exhaust Crossover Pipe
D.029-256-251AExhaust Gasket, Manifold or Heater Box to Head
Cylinder 1 and 4
D.029-256-252AExhaust Gasket, Manifold or Heater Box to Head
Cylinder 2 and 3
E.025-251-261Gasket Only, Heater Box Flange to Crossover Pipe$3.75ea
F.411-298-009Gasket Set With Hardware, Heater Box Flange to Crossover Pipe (does both sides)
G.043-251-509Exhaust Triangle Gasket, Crossover Pipe to Catalytic Converter or Connecting Pipe
H.N 014 684 1Stud, Exhaust Port - Head to Manifold or Heater Box
(Special 8x9x56)
J.021-256-205K or LHeater Control/Flap Box, Left
J.021-256-206K or LHeater Control/Flap Box, Right
K.311-129-777Swivel Pin/Clamp, Heater Cable


Heater Blower, Hoses & Air Channel Parts

Parts List
Ref.Part NumberDescriptionPrice
A.411-963-007BBlower Motor Only
B.261-261-195AFan Housing
C.211-261-269DMounting Bracket Assembly
D.021-256-331AHot Air Tube, Left 72-78 & 1979 Federal Models
D.039-256-331AHot Air Tube, Left 1979 California Models
D.021-256-332AHot Air Tube, Right 72-74 & 1979 All Models
D.021-256-332BHot Air Tube, Right 75-78
E.211-261-235Fresh Air Hose, Left
F.211-261-236AFresh Air Hose, Right


More To Come Soon!


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