Is Jetta 1.8t the same engine as the A4 1.8t?

[Michael Dewar - Sun Scotland]

> 
Adding a chip gets you about 45 more hp, and a chip,
> exhaust, and filter, will push you from 150, to about 250hp.

How can an exhaust and filter gain a 50+ hp power increase ? I would
expect 15 hp max

> 
> THERON
>