Mod To Stock Mufflers

[Paddy_SP]

Originally Posted by Gunny

Re-reading your original post and the various suggestions, it occurred to me (I'm assuming) that you have a stock 90 exhaust. Since shipping presents a problem for obtaining a complete exhaust system, it's probably best to work with what you have.

Near as I can tell (and I've checked the measurements of the 90 as well as the later years' exhaust system) the two bottlenecks of the 90 exhaust in terms of performance are the resonator and the mufflers, all of which have restrictive connectors to the exhaust pipes which should be 2.75". A couple of things you can do and still utilize your existing system is to replace the center resonator with an x-pipe (or less restrictive resonator) ... any good exhaust shop should be able to build an x-pipe to your specifications. The mufflers are also restricted (necked down) on the exhaust pipe side plus one tip is closed off ... you might want to look at the Dynomax line of mufflers to see what looks good for your situation. Dynomax muffs are not terribly expensive and should be able to be shipped easily enough.

Anyway, these are a couple of more ideas for you mull over ... good luck on finding the best solution for your needs.

Thanks for the constructive suggestions - I'll look into the Dynomax line and consider fabbing up a restrictor myself, as we have very few competent muffler shops in this part of the world.