Very nice! I was going to think that the USA sedan exhaust would fit nicely on your non USA wagon. The exhaust is a little shorter than I'd have expected. And as soon as I saw those next-to-last pictures, I was going to say you need to space that out, or it will melt. But you already drove it, and it already melted! Do'oh. You need to space the last/muffler hangers down a bit. I spaced mine down with some extra nuts between the metal hanger bracket and the bottom of the car.

 

It’s going to burn your bumper up for sure and also you will probably get some blackish stuff on your bumper after long. Either trim it up more or do as @TobiasSing said and space the hanger down some. Lastly maybe look into some type of heat shielding plate or whatever it’s called. Those can kinda look cheesy though tbh.

 

I also used some chunks of exhaust flange material to space out the muffler section 1" longer so that the tip would poke past the end of the bumper better and to help avoid any sort of black soot from getting on the bumper:

Definitely made a big difference. Before/after:

 

That's all excellent info and suggestions. I really appreciate it @TobiasSing and @ill_mannered

Didn't realise the hanger bracket was able to be unbolted and spaced.

I was aware of the exhaust flange spacing trick to minimise soot but needed to see how it fit before knowing how much to space it.

I imagine the exhaust flanges are a generic size? I didn't measure the GReddy ones before installing. I guess I can take one off and measure it or take it to an exhaust shop.

How much space do you think is needed between the exhaust tip and the bumper? Half inch? (13-ish milimetres?)

 

Edited my post above, was still trying to edit when you responded again lol oops

Didn't realise the hanger bracket was able to be unbolted and spaced.

Just make sure they aren't so rusty that the posts don't break off!

 

I’d say 1/2” should be perfect.

 

I imagine the exhaust flanges are a generic size? I didn't measure the GReddy ones before installing. I guess I can take one off and measure it or take it to an exhaust shop.

I bought mine based on 1) the thickness needed to elongate the exhaust tip enough, and 2) the inner diameter of the pipe.

I bought mine from this store on Ebay, which still exists and still sells them. I got 2 of the 0.5" 2.5" 64mm ones. They fit perfectly, as you can see above.

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How much space do you think is needed between the exhaust tip and the bumper? Half inch? (13-ish milimetres?)

It doesn't need to be a whole lot. I did mine so that the pipe was centered in the opening (i.e., even gap all around). 1/2" would be fine.

 

Thanks, y'all

 

I hope they are in good condition but I will check based on your suggestion.
Would look kinda cool having sparks flying off behind the car if the exhaust was dragging along the road...

 

Got back under the car today. Removed the rear muffler section and this is what I found 😢

Luckily the exhaust is stainless so it's easier to clean. I used some plastic 'tools' (old auto trans wiring harness clips, lol) and steel floss wool stuff to scratch off the bumper goo. Then gave it a quick polish with leftover headlight restoration kit polish. Then cleaned it off with isopropyl alcohol. Came out great.

I found the rear removeable hanger bracket.

As you can see the studs that the nuts and bracket attach to are fairly short. So that limits the amount of spacing you can do behind the bracket before you run out of threads and need to take a different approach.
I took the bracket off and I put a washer and additional M8 nut on each stud before re-attaching the bracket.
I put some thread locker on the original nuts as I'm sure not quite all of the threads are being used anymore due to the spacers.

Does anyone happen to know how to get to those studs (or bolts?) that the bracket attaches to? Not sure if it's acccessible from the trunk/boot or behind the bumper etc? 🤔

I put the exhaust back on. The spacing is way better.

It's still sitting a little close on the left side (actually looks worse than it is in the pic due to the angle). I messed with the rear flange connection a bit to try and get it sitting a bit more centred but it didn't seem to make much difference. slSo I sliced a tiny bit more of the inner edge of the bumper off, gave it a shake and it didn't seem to contact the bumper.
I didn't want to spend too much time messing with it tonight. Will probably need to try adjusting it at the front flange where the new exhaust meets the old exhaust.

I also didn't try scraping any of the black melted goop off the underside of the bumper cutout. Realised I shoulda done it after I had exhaust back in. But you can't really see it anyway.

And I ALSO forgot to measure the flange while I had it apart again 🤦‍♂️
'Cos I would ideally like to have the exhaust tip stick a little further out of the bumper to reduce soot or heat damage etc.

 

Does anyone happen to know how to get to those studs (or bolts?) that the bracket attaches to? Not sure if it's acccessible from the trunk/boot or behind the bumper etc? 🤔

Yes, they are studs pressed in from inside the boot, for the towbar install i had to smack one out with a hammer, drill and replace with a bolt and bracket from the boot.

Its tucked in behind the covering near the rear edge of the boot,mounted into a extra brace. I would leave the brace in situ if i were you, its there to spread the load across the thin sheet metal towards the frame of the car.

 

Looks good.

 

Well there you go, that's one way to put in longer bolts. I never would have thought of that. Yes, they are short, but there's enough to lower the exhaust enough. The amount you lowered it is enough. Looks good! Too bad about the melt damage, but who cares.

 

I'm amazed you can still buy this rear exhaust hanger bracket with the hard-fitted rubbers. It's not even that expensive!

Part info: https://www.amayama.com/en/part/toyota/1750974230

I just ordered some stainless steel flanges and gaskets so I can get the exhaust tip sitting a bit further out of the bumper.

 

It's a shame about your bumper but you shouldn't be able to see it once it's at ride height.

What I used to do to space mufflers/exhaust pipes down is to jam something inside the rubber hanger. Since there's two hangers, you should be able to position the exhaust where you want in the bumper hole.

 

Hey that looks sweet! I'm with you, i love the GReddy detail on my Supreme SP as well. (I'll be posting about that soon) I also noticed the flanges are milled which is nice. The large cannon-style muffler isn't as obvious as I would have expected. It's a shame about that bumper tho. This may be an odd question, but does your exhaust expand when it gets hot? Mine gets like 1/2" to an inch longer after driving lol

 

This may be an odd question, but does your exhaust expand when it gets hot? Mine gets like 1/2" to an inch longer after driving lol

Steel expands when it gets hot. So it would certainly get longer after driving.
I have not looked before and after to see by how much it happens on my car. But now you've mentioned it, I may see if I can notice a difference.

Depending on your engine mounts' age and softness, there could possibly also be some movement in how the exhaust sits that could be attributed to the engine moving around.

 

Most alloys of steel expand right about 10e-6 inches (10 millionths of an inch) per inch per degree F.

So a piece of steel that measures 1.00000000 inches long at 75ºF would measure 1.000010 inches if heated to 76ºF.

If an exhaust is, say 12 feet long (144 in)) and was heated 400ºF (from 75º to 475º), you would expect it to grow:

144 in * 10e-6 in/in/ºF * 400ºF = 0.576 in

Of course, the entire length of the pipe won't be subject to the same temperature change as the exhaust gases cool as they travel down the pipe... This is just a rough approximation.

Also of note: This grown can NOT be contained or prevented. It WILL grow. All we can do is accommodate it - expansion joints in bridges, flex-bellows in exhausts, sloppier tolerances, etc. We can also control which direction it grows. For example, the steel will grow equally in both directions along its length; but if you constrain just one end...that end will stay put and the other end will grow away from it.

 

@Hodgdon Extreme 's answer was way cooler than mine 😅

I took a better pic of how the exhaust is sitting in the bumper cutout now.

It would probably still be touching the bumper on the bottom left side if I hadn't previously sliced off that bit of the material on the bottom left of the bumper cutout.
I will try and get this sitting more centred when I add the extra flange to space the tip out a but further.

Here's the original pic of how far out the tip protrudes when the car was cold. It's also before the rear hanger bracket was spaced down.

This is a pic from today after a long drive when the exhaust is at operating temp. The angles aren't quite the same but you get the idea.

So it does look like the exhaust gets visibly longer when it heats up.
I kind of like this position. Pretty flush. And this is where it will sit most of the time when the car is in use.
So will that be far enough out to stop the bumper sooting up?

Here's another pic.

What do y'all reckon? 🤔

Oh! And I did a full power on ramp pull today to redline in 2nd gear and it sounded great! 😍