Exhaust - New Center Bullet

After installing my street type muffler, I can feel significant improvement on air flow no more restriction. Nice sound on the street but inside compartment got strange sound appear. Demm... need to change my center bullet since last time exhaust shop recommend me to change the center bullet and extractor... later i think...

so, today.. i went to exhaust shop to change new swirl/twister center bullet... quote me rm170. so, i give a try...

and the result is...