Gti6 Downpipe Modifying

[djinuk 2]

Ok i have my gti6 engine in , and i have my 1.9 gti downpipe, ive offered it up and can see i need to shorten it quite a bit and also i need to remove the split, however ive noticed this split goes right the way down the downpipe.

 

Do i need to cut the pipe in half to remove this and then weld it all back together ?

[welshpug 1,661]

nope, you need to source a downpipe without a split

[Spiky 37]

with mine i cut the flange off

 

then cut off around 6" of pipe thus removing the flange, then welded it back together at the right angle

 

simplez

[djinuk 2]

lol , damn, where on earth do i sorce a downpipe without a split.

 

Failing that your idea sounds good spiky, however my downpipe almost looks like the split carries along about 15 inches.

[Spiky 37]

its only welded at the top section

[djinuk 2]

ah ok then, i think i will adopt that approach then

[Cameron 16]

The downpipe is made from 2 D shaped pipes welded together so you can't cut the split out, you'll have to find one without (old 1.6) like Welshpug says. I just used one with a split and didn't have any funny results, although I only did that because Peugeot gave me the wrong downpipe and I couldn't return it.

Edited September 10, 2009 by Cameron

[Spiky 37]

well obviously not all of the them are, unless my eye deceived me when looked at mine

[Cameron 16]

Look a little closer, its not obvious viewed from the flange (oo-err) but when you cut it up to shorten it you'll see. That, or only the genuine Peugeot ones are made that way.

[Spiky 37]

lol...trust me, mine was just "tacked" inside, and is definatly not 2 "D's"

 

 

this is a peugeot remember, there is zero consistancy..lol

[Cameron 16]

You sure yours was genuine?

 

I suppose that makes sense..

[richsmells 2]

Cheapo replacements either have no split (like mine ) or a crap split, tacked in that doesn't run the length of the pipe. An early 1.6 downpipe will have a smaller diameter.

Edited September 11, 2009 by richsmells

[djinuk 2]

think i may make this pipe from scratch, mine is defo two ds that goes really far down the downpipe so i dont think i can modify it, i may go to the scrapyard and see if i can remove a downpipe off a 406 or somthing with a similar engine.

[Cameron 16]

You could get a downpipe off a GTi6 or VTS if you're lucky, or a 406 with the RS engine if you look hard enough.

[djinuk 2]

thats the plan, im sure i saw a 406 with the same engine as the gti6 only the inlet was plastic and the exhaust manifold appeared to be much similier in design

[Cameron 16]

Hmm, after a quick browse on Servicebox it looks like the cat is going to be a problem on standard 306 and 406s.

[djinuk 2]

bugger does the cat sit in the downpipe then ?, i was only going to get one off a 406 in order to have a downpipe with no split.

[Alastairh 47]

its only welded at the top section

 

Just be careful, double check the overall length of the exhaust so that it doesn't clash at the back box end.

 

I have a Xsara Vts exhaust if its any use.

 

Al

[djinuk 2]

if i dont find a diffrent downpipe i may just use the one with the split.

[rubyna 4 1 Cars]

Ive seen no difference with the split pipe after changing, i am using a magnex system from there back..

Luke..

[Cameron 16]

It might cost you a couple of horsepower but nothing noticeable.