Type 4 Exhaust (Also Fits 1983-85 Waterboxer Engines) - OEM Stainless Steel

This replacement stainless steel rear exhaust muffler (silencer) is a premium OE-style solution for classic Volkswagen buses fitted with Type 4 air-cooled engines and early 1.9 Waterboxer engines. It is suitable for VW T2 Baywindow models with 1700cc, 1800cc, and 2000cc Type 4 engines, as well as VW Type 25 / T3 buses from 1980 to 1985 fitted with the 1900cc Waterboxer engine.

Designed as a direct replacement for the original rear silencer, this exhaust muffler restores correct exhaust flow and factory noise levels while offering the major advantage of stainless steel construction. Internally, the silencer uses a pressed OE-style chamber and baffle layout to absorb exhaust pulses and reduce noise without restricting gas flow—ensuring smooth engine operation, good torque characteristics, and comfortable cruising.

Manufactured from high-grade stainless steel, this silencer provides excellent resistance to corrosion caused by moisture, road salt, and heat cycling. The exhaust features a matt grey bead-blasted finish, giving it a clean, factory-correct appearance rather than a flashy polished look—ideal for restorations and original-style builds.

This unit is TÜV approved, confirming that it meets strict German quality, noise, and safety standards. Supplied with exhaust studs already fitted, installation is straightforward and hassle-free, making it a practical and long-lasting upgrade over mild-steel alternatives.

Engine & Vehicle Compatibility

• Engine Types:

  • Type 4 air-cooled: 1700cc / 1800cc / 2000cc

  • Waterboxer: 1900cc

• Vehicle Applications:

  • VW T2 Baywindow Bus (1972–1979) – Type 4 engines

  • VW Type 25 / T3 Bus (1980–1985) – 1900cc Waterboxer

How the Part Works

Exhaust gases exit the engine and pass through the silencer’s internal chambers, where sound energy is reduced and exhaust pulses are smoothed before exiting the tailpipe. This process keeps noise levels under control while maintaining the correct back pressure needed for efficient engine performance and longevity.

Fitting Information & Recommended Additional Parts

• Material: Stainless steel

• Finish: Matt grey bead-blasted

• Approval: TÜV approved

• Fitting:

  • Exhaust studs pre-installed

  • Direct bolt-on replacement

• Recommended during installation:

  • Exhaust gaskets

  • Exhaust clamps

  • Exhaust mounting rubbers

Renewing associated fittings helps ensure a gas-tight seal, reduces vibration, and maximises service life.

Key Benefits

• High-quality stainless steel construction

• OE-look pressed exhaust box

• Matt grey bead-blasted finish

• TÜV approved for quality and compliance

• Long service life compared to mild steel

• Ideal for restorations and daily drivers