The flowmaster is a chambered muffler. Some magnaflows are hollow (or atleast you can see from end to end). A stock resonator does A LOT for these cars. How are your tips relative to the bumper? My interior noise doubles at a minimum if i just have my 90* bends with no tips on, which are not exiting after the bumper.
Resonated tips won't help, and might "rice" the noise as there'* no reverb happening after the "resonator".
Let it break in, it'* brand new, and they need to break in, and mellow out. Check your padding/carpet as mentioned. Give it 1000k miles before you make a decision, it needs to be heat cycled.
'06 Vee Dub GTI 2 door Tornado Red
- 2.0 Turbocharged, Intercooled, Direct Injected, 6 Speed DSG, Underbody Aero, 17" Classix
- Moonroof, Bi-Xenon headlamps, Interlagos Plaid Sport Seats, 6 Disc In-dash, iPod integration, GTI Monster Mats (winter)
'93 Bonneville SE Purple Pearl H4U package - picked up June 23, 2003, Traded-in June 28, 2007...