Turbo flange and down pipe?

Gmstewart22 · Post by **Gmstewart22** » 04 Oct 2018, 08:42

Very enlightening, that answers my question I guess. Sounds like the lpt and hpt have the same flange setup so a T5 downpipe should fit in place of my glt downpipe!

Post by **erikv11** » 04 Oct 2018, 14:33

Yep, looks like you are talking about a 2000 T5 downpipe (angled flange and downpipe) fits your 2000 GLT's existing flange, yes.

But a 98 T5 downpipe has a straight flange, you would have to grab the flange from the 98 T5 in addition to the 98 downpipe. The straight flange would then bolt right up to your turbo.

Flange to downpipe must match: straight to straight, angled to angled.
Flange to turbo just a V-band, completely interchangeable
Flange to exhaust manifold 4 nuts/studs, completely interchangeable

Redundant I know but hope to be clear.

Gmstewart22 · Post by **Gmstewart22** » 04 Oct 2018, 15:51

Thank you all for your help. It's much appreciated!

Post by **jimmy57** » 04 Oct 2018, 17:29

The exhaust housing is machined with nothing to remove or change about the downpipe fit. It is either cast and then machined with the spherical ground area where the spherical flange on pipe with the floating three fastener retainer ring or it is the cast and machined version with a flat angled larger opening that accepts the fixed downpipe flange.

Post by **Ozark Lee** » 04 Oct 2018, 17:47

Mine is as Jimmy57 describes. A flat machined surface that is fixed.

...Lee

Gmstewart22 · Post by **Gmstewart22** » 04 Oct 2018, 18:22

Wow, so much info from one one question. I had no idea volvo had so many variations in such short order. Evidently my 95 T-5 is the conical "lame" flange and my 00 glt is angle flange. Sound like the angle flange is the most efficient tho.

h20ham · Post by **h20ham** » 09 Dec 2019, 16:46

anyone know the flex pipe lengths, from turbo to cat?
2.5" diameter I suspect. or is 2.75 better? or to be safe...

for a 96 855t

rollinheavy65 · Post by **rollinheavy65** » 17 May 2021, 12:35

Question regarding this topic, I have a 97 850 GLT, with a motor out of a 98 v70r. So I have the t5r with hpt. Ppl have told me to get the angle flange instead on the straight flange when doing the down pipe. Now are they talking about the down pipe itself being an angle flange, and if so would the work with a straight flange. Or did they mispeak and all down pipes are the same and only turbo outlet is straight, angle, and conical. The reason I'm curious is bc I just purchased a 3 inch exhaust cat back. So I was going to replace the down pipe while I was in there, even possibly the header. Any advice and clarification would be so helpful thank you.

Post by **erikv11** » 17 May 2021, 14:55

The flange is a separate piece. There are three pieces: turbo, exhaust flange piece connects to turbo, downpipe connects to exhaust flange piece (exhaust manifold does too - so tehnically 4 pieces if you count manifold). See my post above about what has to match and is interchangeable.

rollinheavy65 · Post by **rollinheavy65** » 18 May 2021, 06:52

Okay that helps there. And I wish I would've seen that above post, sorry about that. But is there any noticable performance benefits switching the exhaust flange piece between straight or angled?

Turbo flange and down pipe?

Re: Turbo flange and down pipe?