Original muffler dimensions

earl · 10-19-09, 09:34 AM

Does anyone know what the original muffler dimensions are for a BJ70 or similar? Pictures would be awesome too if someone happens to have a lot of time on their hands!

Background info...

I had the exhaust re-done on my BJ70, and I guess I wasn't specific enough and they put on a smallish (14x9 inche oval) "turbo" muffler. It sounds fine as long as the engine isn't under any load. Under load it sounds horrible.

They mentioned they could maybe go 4 inches longer and try a "Quiet Flow" muffler, which is a "Walker 3 tubed design, premium muffler that is designed for O.E. equivalent sound and precision fit".

I think O.E. sound is what I'm looking for... but I don't want something smaller than O.E. as it'll end up being louder and less restrictive (?).

James

Eric Winkworth · 10-19-09, 10:40 AM

I think the factory muffler is somewhat of a joke, as long as you have it routed out the back, a magnaflow would sound good I believe... and you can get them for lots of different sized pipe

earl · 10-19-09, 11:14 AM

I've never seen the factory one, just the line drawing on toyodiy.com. I guess I'm just looking for an idea of what size muffler I need.

Also, if the size of the stock muffler is similar to what I have, then I know that the muffler they put on is just loud.

Natty · 10-19-09, 12:01 PM

these pics are from my BJ73... yeah its a rusty muffler but it still works fine! Dimensions are 4.25" tall x 8' wide x 16" long... hope this helps... sorry but I didnt measure pipe inlet size, let me know if you need it...

earl · 10-19-09, 01:35 PM

Natty, thanks a lot for those pics and dimensions!

Natty · 10-19-09, 02:50 PM

my pleasure Earl... I'm willing to bet thare are a ton of mufflers and sizes you could play with

earl · 10-19-09, 04:15 PM

Ya, I think you're right. They ended up putting on an 18" long Walker muffler. I think it was from their Tru-Fit line which is probably super cheap. Anyway, that solved the problem. The horrible tone is gone under load, and they didn't charge me to swap the mufflers.

Eric Winkworth · 10-19-09, 07:31 PM

glad to hear it...

I'm dealing with a side dump muffler for now, I used to like the sound, now it's old...

cheers

Natty · 10-19-09, 07:54 PM

yeah I think I'll try something cheap when this one goes... some guys run without one completely, but without carpet in mine there's no way I would...?