Is a gasket needed?

[BangWRX]

Ok if you read my other thread you know what my problem has been for the last week. The answer to the problem was that i had a completely rusted donut gasket to my downpipe and just this morning i ripped it off. This what was causing my leak because the two pipes werent connecting properly. Now it is a perfect fit.

Now my question is... can i connect my catback to my downpipe without there being a gasket in between? I really don't want to go to subaru and buy a $40 gasket when it is not even needed. Should i just connect the two pipes without a gasket?

[wrxtacy19]

go to www.subydude.com you get them for like 15 dollars.

[BangWRX]

is this the piece i need? It looks like it would fit, but im using it to connect the catback to the downpipe (the midpipe?). Is this piece really needed if there is no donut gasket and would it work?>

http://subydude.com/osc/product_info...f47d617fdf8f56

[BangWRX]

now there is no gasket and still a leak and also severe rattling....ughhh i dont know what to do...so many problems for a basic catback

[Demostrega]

I'd assume that Subaru had a gasket there to serve some purpose.. if it comes to it.. go spend $40.

[Vew]

I think my Perrin came with a fiberish like gasket.

[wrxtacy19]

yes that is the gasket

[hondaeater]

so many problems is right. My god I would have ripped that ##### off there long ago. . .

The donut gasket subaru uses is to help maintain flexibility at that joint to help prevent leaks in the long term. MANY aftermarket exahust makers do NOT incorperate that donut style gasket, is there production flawed? I would say hardly. My Helix DP is mated to my stock catback with no donut, running on about 1.5 years, my own makeshift gaskets used from autozone (read about 5$) and No leakie yet.

If it was leaking badly with the donut in place, what makes you think it will stop leaking if you put another on?

And why is it not mating up now? eg where is the leak?

maybe you should sell that mother on ebay and get on that mates to the stock DP