What diameter pipework is best for 1.6 TD exhaust?

[MontanaGTD]

2" or 2.5"  - what are peoples thoughts?

[2mAn]

2" or 2.5"  - what are peoples thoughts?

for a TD get the 2.5", if you got enough money get a passenger performance 2.5" downpipe also. very good combo from what everyone says, i wont know myself for a few more weeks, but thats what im doing for mine

[Baxter]

http://www.jetex.co.uk/website/custom_parts.php
 

[Baxter]

http://www.dynoflow.co.uk/bends.html

[935racer]

Upgrade your downpipe and exhaust at the same time, the stock downpipe is very restrictive. Go 2.5" from the turbo back, use mandrel bends, and if you insist on a muffler go with a glasspack or a muffler that you can see through one end out the other.

[stewardc]

On my Caddy, I used a 2.5" PP downpipe. When I took it to my local exhaust guru, he suggested a 2.25" system with a large magnaflow muffler. he said 2.25" was the max. size that would fit easily, and was way larger than the engine actually needed. What I noticed is that the turbo spools much earlier than before, and the sound is sexual.