hmmm its the HKS HI POWER, the 409 i dont know. The box seems to have come straight from HKS CHina, so everything is in Chinese! lol THe silencer comes with the muffler tip, there are two bolts on either side. Not sure on the measurements. I will try to remmeber a ruler when i go for my lunch break. The soiund is really nice with the silencer, not too loud. More like a low tone grumble. I do have a short ram intake from K&N as well. I plan on getting the DC headers installed too. Anyhow. Its very nice and I enjoy it!!
I was wondering is your exhaust is HKS Hi-Power409 Exhaust? If so what silencer are you using and what are the measurements. I am thinking about getting one second hand but i dont think it has a silencer on it and dont really want it to be too loud. Just want a mature and nice sound.