After years of owning American sports cars I have taken the plunge into foreign sports cars and while the TT is not the fastest car I have owned, it's by far the most fun to drive.

I only want to change a few things, cat back, downpipe, ECU and diverter, all of which which will hopefully wake up the engine and reduce the turbo lag. The car is an 05 225 roadster.

My primary concern is droning in the cabin and know a decent catback with a resonator is required. After speaking to relentless, their catback does not have a resonator and want to keep the price under 700. Looking for recommendations, there is not a specific sound I'm looking for, a little deeper but not cheap sounding either, most importantly, no drone.

I am also looking for a new head unit and would like to keep the radio display on the dash while allowing the TT cover to fully close.

Thoughts, comments, recommendations? Thanks in advance for the comments.