downpipe

wat downpipe is the best for my td05 turbo eclipse gst?

2.5 or 3" mandrel bent, stainless steel. Do a search here or on DSMtuners.com, there are advantages and disadvantages to both sizes.

does it matter wat brand i get or is it all then same if i get it customized at a muffler shop.

its all pretty much the same if its mandrel bent. if your having it made at a muffler shop make sure they do mandrel bends if its a regular bend then its more restricive so youd want a 2.75 inch instead of 2.5 and so forth. remember that although a bigger pipe with less restricion will offer some top end hp gains, the loss in backpressure may result in loss of low end torque (off the line) . peace

Dont really have to worry as much about losing low end on the turbo cars, its not nearly as obvious as it is on NTs. Remember that on a turbo car, the turbo is the major exhaust restriction :)