yo bro Weng, i'm the Gen 2 driver who contacted you last night. Today went to your Serdang branch & I really appreaciated your staff Ah Dee's nice work. At first, he just told me to change stainless steel 4-2-1 extractor & bullet enough already to have better performance. Never push me to change muffler,unlike others who keep asking you to change this & that. But I cannot tahan after saw all the designs displayed in the shop,told him i wanted to change muffler as well,haha,at last he showed me Mugen twin loop. Tested the sound for me,very nice sound! On the way back home, really can feel the difference in terms of power & pick up. Please help me to say thank you again to Ah Dee & of coz to you too,Weng.