bdkim88

As you know borla catback roars under 4K rpm.. relatively quiter after that.. just can hear engine rev over 4K rpm

So, I'm making a plan to replace the both end muffler.

No muffler with straight pipe is not my taste though.. volume is good but rattling is not my style

And It's gonna be my 2nd version ( 1st one is borla stock muffler ) , so I bought 4 titanium tips ( 89mm size) to make the look as greddy exhaust



back to the subject..
What muffler should I consider for turning the sound of over 4K rpm more aggressive?
Please don't suggest me to go with aftermarket headers
( I think straight bullet type muffler, 1 hole with inlet/outlet would be great )

Have you guys experienced 'borla xr-1(multicore) or pro XS series?" ??
Or anything you guys recommands would be appreciated. ( less drone would be great )


borla catback pipe diameter is mainly 2.5 inch right?

idoke1

iTrader: (5)

I used to have a custom borla xs power mufflers exhaust on my previous is350. They are quiet if you keep everything stock and only replaced the muffler. I then did a custom full x pipe with 2.5 inch straight piped to borla mufflers. It sounded great but it droned so much. I added a custom dual inlet and outlet resonator but it still droned. I can't say for sure what the F would sound and i am curious as well.