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Tue Sep 16, 2008 11:39 am

Which would work better on a 2 liter bus motor which the catalytic converter and complicated plumbing mysteriously fell off of (keeping heat exhangers), a stock 1972-1974 bus muffler, or aftermarket headers?

Tue Sep 16, 2008 11:42 am

Your stock heater boxes have three bolt triangular flanges. The 72-74 muffler will not bolt on them. That muffler has four bolt trapazoid flanges.

Tue Sep 16, 2008 11:48 am

Is your bus a 79? If so then the 72-74 will work.

Tue Sep 16, 2008 11:56 am

My bus is an aircooled vanagon. I sometimes lurk on the Bay Window forum because all the vanagon people want to talk about is their wasserleakers. Is the 72-74 muffler better than headers?

Tue Sep 16, 2008 12:52 pm

I think you can use this set up but you may want to e-mail to ask.

http://www.aircooledtechnology.com/store/product.php?productid=16863&cat=353&page=1

Tue Sep 16, 2008 1:35 pm

I put a 72-74 EMPI exhaust on my 80 vanagon and had to clearance some of the back tin if I recall. just be mindful of that. if yours is a beautiful stocker.

and the 72-74 mufflers aren't all that much cheaper then the other set-up. well w/o the Cat sure..

Dan

Tue Sep 16, 2008 2:20 pm

the stock 72-74 muffler will not fit unless you crush the hot air tubes or use a spacer. if you don't have stock heat the tubes might be gone anyhow. if you are retaining the stock heat tubes we make a kit:

http://www.germansupply.com/xcart/customer/product.php?productid=17477

i know people are gonna bust my chops about the cost of this kit, but the spacers are waterjet cut and it's an expensive process. whatever you do, for the 72-74 muffler you need something to move the muffler away from the HE by about 15mm. our spacers are 19mm thick.