[yeehaw8]

Originally Posted by RawG

I would like to know as well. I'm from Australia and as far as I know, ours come with OPF.

Hey, I ordered this exhaust through pro speed racing. Had it installed at Melbourne Performance Center. Paired it with a dAHLer dual valve controller. Have had no problems with it, sounds great aswell.

[Viento.]

Got mine installed a few days ago! Here is my personal feeling.
HJS downpipe, amazing sound BUT drone at 1.5k~2k rpm with valve closed which cannot be ignored while daily driving.
I’m trying to find a solution to reduce the drone as much as I can, cuz I don’t want to change back to stock dp since I’m going to do stage 2 ecu tune.
So what if I do some work on the midpipe? Like adding a resonator or change the thickness of the midpipe? Anyone knows

[mike@x-ph.com]

Originally Posted by Viento.

Got mine installed a few days ago! Here is my personal feeling.
HJS downpipe, amazing sound BUT drone at 1.5k~2k rpm with valve closed which cannot be ignored while daily driving.
I’m trying to find a solution to reduce the drone as much as I can, cuz I don’t want to change back to stock dp since I’m going to do stage 2 ecu tune.
So what if I do some work on the midpipe? Like adding a resonator or change the thickness of the midpipe? Anyone knows

you can add a secondary cat to the midpipe for the best result