Milltek, wots resonated or non-resonated

[samy_1800_turbo]

hi iv just been looking on awesome GTI at milltek systems but wot is the differents between non-resonated and resonated cat back system.

And another question, it say below Golf Mk4 1.8T/1.9TDI Milltek resonated cat-back Discreet wot does discreet mean, does it just mean you cant see the exhaust like the standard gti exhaust system is like.


Golf Mk4 1.8T/1.9TDI Milltek non-resonated cat-back 4 Motion £268.20 
Golf Mk4 1.8T/1.9TDI Milltek resonated cat-back 4 Motion £280.67 
Golf Mk4 1.8T/1.9TDI Milltek non-resonated cat-back Anniversary £268.20 
Golf Mk4 1.8T/1.9TDI Milltek resonated cat-back Anniversary £280.67 
Golf Mk4 1.8T/1.9TDI Milltek non-resonated cat-back Discreet £268.20 
Golf Mk4 1.8T/1.9TDI Milltek resonated cat-back Discreet £280.67

[Ivor Mk4 Turbo]

hi iv just been looking on awesome GTI at milltek systems but wot is the differents between non-resonated and resonated cat back system.

The non-res system has the 'straight through' or non-silenced centre section, whereas the res system has the (you guessed it) the silenced centre section.

And another question, it say below Golf Mk4 1.8T/1.9TDI Milltek resonated cat-back Discreet wot does discreet mean, does it just mean you cant see the exhaust like the standard gti exhaust system is like.

Correct.  Also means you can keep your current/standard valance. 

[samy_1800_turbo]

thanks, will they give the same BHP increase when i get a revo or is the non-res system better. I dont want a load exhaust.

[Ivor Mk4 Turbo]

Non-res will be louder, but apparently will give SLIGHTLY more gains due to less back pressure, & vice versa.

I have a resonated Blueflame cat-back on mine & I wouldn't want it any louder, TBH.  (I am 30 now, after all  LOL!!!)

It's no louder on tickover, gives a nice growl when you boot it & isn't 'boomy' when cruising at speed on motorways.