3.3TT Catless primary and secondary downpipes issues.

[CHUPAPI]

Is anyone running primary and secondary catless downpipes ? Right now I have arc secondary and I was looking into getting primary. I have read about overboost issues and that the turbo won’t have enough back pressure and will leak oil. Does anyone know if this can be fixed with a tune and what are the performance gains?

 

[Ohiocruiser]

You can't change back pressure with tune. But you will still need a tune if you want to replace primary downpipes. I belive, you can get an extra 10-20hp with them. Just be ready to smoke and probably add oil on regular basis. Now, installing them, is a whole different topic.

 

[CHUPAPI]

I already have secondary down pipe. So I might just look into high flow cat primaries but I honestly don’t want to have oil leaking due less backpresure. That is not good for the turbo plus I will need to constantly keep an eye on the oil.