I have a confuseing question, am trying to buy a GT30r but i do not know how or what downpipe to connect to the gt30r. can anyone help me out on this, i been told i can weld a 90* bend to the downpipe and weld a V band flange, plz help

 

First off you need to know what size/ bolt pattern the hotside of the turbo. A vband flange will only work on a v-band hotside

 

ok once i get that done what can i do to bolt this to my exhaust/downpipe?

 

Your gonna need a custom downpipe made. Any exhuast shop should be able to tackle the task. A downpipe used for stock turbos will not work with a larger frame turbo

Also don't forget you have an o2 sensor that goes after the turbo

 

so i can discard my downpipe and would have to pay for a new downpipe?

 

Yes, your stock turbo downpipe will not be used with the 30r. your new dp will depend on the mounting orientation of the turbo manifold and the turbo itself. Most turbo kits will come with a compatible dp, so if you know what kit (namely what turbo manifold) is being used, you can probably source a premade dp. And of course u will need to ensure the dp matches your turbine housing flange pattern (4/5 bolt, v-band).

 

find out what flange or bolt pattern the hot side on the turbo is. After you do that, there are numerous companys that sell a 4 bolt, 5 bolt, or v band 02 hosing/downpipe for your specific turbo.