Originally Posted by
JEFASOLD
Right at the moment, I am working on how to get the proper angles to connect to the muffler. After cutting the back CATs out I will install 2 45 angles onto the down pipes, then use clamps when I go into the Y pipe. This is the best place for a separation in the system. The Y pipe, resonator into muffler will be one piece. An added advantage is the weight savings! I wont know how much until I get it all done. This may take awhile, as the polishing of the entire system takes some time. I have been sanding with progressively finer paper up to 2k then using buffing wheels and compound up to the white stuff. I still am a little short of the polish YONAKA puts on their products but it's pretty close.
As stated before an "X" pipe in place of the rear cats and "H" pipe solves the problem completely. I deleted the muffler and have the OEM resonator in place and NO drone what-so-ever.
From Magnaflow:
X-Pipe features a gentler radius, which allows for better exhaust gas scavenging, noise cancellation and better balance between cylinder banks, resulting in a significant increase in power and torque.
meh03, I didn't witness the install. I just dropped off my car and picked up later. The rear cats don't have O2 sensors so no problem removing them. They told me the install was pretty straight forward. I'll have a look later to see exactly how they installed it.