How big of a downpipe can I connect to the stock swingvalve?

I have a basically stock 86 GLH Turbo and i'd like to upgrade to bigger exhaust, how big of a downpipe will connect to the stock swingvalve and still use the right donut gasket and stuff?
thanks
Mark

[BuRn__]

i dunno how the guy did mine (was already on the car when i bought it), but i have a 3" hooked into what looks like the stock 2.25SV

[86Shelby]

Can anyone else add to this? What size is the stock GLHT downpipe? I want to throw a 3" system on my car. I'd like to have all the stuff ready to do it all at once without any runs to the parts store.

[2Lebarons]

i dont know about the 2.25" SV, but you you can install a 3" pipe to a 2.5" SV. however, the seal may not always be ideal, but i didnt have any leaks with mine...

my new hybrid turbo will be here today, and i recently aquired a brand new TU 3" SV off of ebay a couple of weeks ago, so, i wont have to worry about that anymore....."thumbs up

[Keith Alto]

Gary had a 4" pipe off Relentless on
his parts for sale!
Don't think you could hook up an exhaust though.

[Super60Dodge]

I think they have 4" race mufflers in the big Summit catalog but I may be wrong. I know it would be a bit loud though:big grin:

According to FWDperformance you can hook up a 3'' downpipe to the stock 2.25'' garret swingvalve.