hey everyone, i just have a question.
I pulled the full exhaust system off my car today and the Y-pipe looks so bloody dodgy and roughly made i was wondering if it is a factory one? (I had a 2.5" custom catback installed early 07).

 

Looks factory to me.

JamesC

 

Not much bigger that the LG4 piece my buddy and i pulled off yesterday.

 

The Y above actually looks like the more desireable Y. In the following pic, the Y on the left is an LG4, the one on the right an L69:

https://www.thirdgen.org/forums/atta...tion-ypipe.jpg

Who said the LG4 exhaust was restrictive! Brandon, glad to see you have a friend now

JamesC

 

wow there is a huge difference from LG4 to L69, i just thought the welding where the second pipe joins to the main one looked real crap and didn't think it could be stock but it looks like it is.

 

I'm not seeing crinkles in the bends, so I dunno. It looks more like a bad shop-made one, that at least didn't crinkle the bends.

 

If you look at where the cat goes onto it, its a bolt flange and not slip on.....or were some like that? I mean I see in the picture posted that the l69 one has a bolt flange but it looks a little different to me and also I dont see crinkles.

 

Here are some pictures of the old L69 system I once ran. The flange on Venom's piece may have been modified to accept the cat (the original cat for an HO is a four-bolt as you'll see below) The link provides another side-by-side L69 vs LG4 Y:

https://www.thirdgen.org/forums/atta...ers-ypipe2.jpg

 

The 2-bolt cat had me wondering, too. Looks a little bigger than the LG4 pipe, but smaller than L69.

Wonder if "Australia" has anything to do with it. Probably not, but it is still "curious".

 

umm just had a look and it seems they cut the old flange off and welded a new on on to take the new cat, the cat that is on there is a 2.5" one and the outlet for the Y-Pipe is 3"

 

Great. I suggest you never return to that shop. Here's what you needed:

http://store.summitracing.com/partde...view=32&N=700+

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[QUOTE=VenomX-87;3584099](I had a 2.5" custom catback installed early 07).

Your original L69 exhaust from the cat back should have been a 2.75. Apparently, you actually downgraded.

JamesC

 

na they are actualy one of the 2 best in Adelaide, the cat is a 2.5" high flow.
They asked me if i wanted 3" or 2.5".
I said i wanted 2.5" catback coz i thought 3" was a bit overboard for a stock 305, I noticed a huge improvement over the stock exhaust with this new one both in performance and sound.

besides this exhaust is going to be for sale soon because once i get the ZZ383 installed im getting a complete dual 2.5" system made for the car as well as extractors.

 

It's all starting to make sense now. HO 'Bird, cut-off cat inlet flange, no quantitative dimensional reference - stock HO y-pipe.

 

haha, don't tell him that he might run off.