This muffler has a 2" inlet and and outlet and offers substantially better flow than the stock Vanagon muffler. It is close to the stock size in both diameter and length and fits into our Stainless Muffler Brackets with our heavy duty 6" Stainless Muffler Clamp. It is all welded aluminized construction and weighs almost as much as the stock unit. We generally install this with our high flow cat and a simple tailpipe made with half of a 2" mandrel bend. It fits well in 2WD and Syncros and has a bit more sound than stock but is still quiet enough that the average Vanagon owner is not put off by the noise level.
To install this muffler, you will need:
We typically use the 2" muffler and catalytic converter for the 2.2L and 2.5L Subaru installations but we have also installed this muffler on a stock Vanagon using our Stainless Muffler Brackets and heavy duty 6" Stainless Muffler Clamp - the muffler is too large for the original VW brackets. Also, the stock VW "J" pipe works well with the 2" exhaust.