bro gilajazz... it's all thanks to u & ur freakin poison
After adding the intakes, it was fantastic.. nice growl & better response, loved it.
But after installing the US spec Performance Exhaust (with midpipe), i felt the response was slower, only kicked in after 3.5k RPM or so

But got a lot of vroom vroom sound... Unfortunately, too much air rushing through the mid-pipes (these exhaust was designed for 330 & 335 wan

) causing additional vibrations and additional unnecessary noise... so ....... last week I put back the original resonator but kept the performance mufflers and now all is good. No more exhaust vroom vroom but also no more additional vibration & unwanted noise so it's all good. And the initial response is now back to normal.
Oh and err.... i'm slowly filling up my piggy bank with 50cent coins so I can get the strut bar & beloved yellow bananas. But it'll take some time for kuli kia like me la... kekeke