Thanks daine, not long for you now mate. Bet you cant wait:tup:

I agree, pretty damn good sound quality on those vids.

Almost getting me as anxious about my FI exhaust as daine.

u already know man. ive been counting down since the days were in the 30's lol!

11 days to go!!

Really loving this exhaust the more I drive. :)

u know u wanna put hfc's on...

Nah... don't want it any louder!

I wouldn't. Well, berks atleast. I get a bad hiss. It's annoying.

from where on the hfc's is the hiss coming from? or is it just a design side effect...

I don't know if it is the honey comb that is causing it when the back pressure is released, but when you rev it or let off the gas, your car hisses at you...lol That is the best way to put it.

Just think it's not hissing at you, but at the cars around you... :stirthepot:

lol like a pissed off snake :bowrofl:

The hiss is no good. Honestly, I think the 18" CBE sounds perfect. The best way I can describe it is as 2003 Cobra with HFC X-pipe and Magnaflow CBE meets Ferrari F355. Nice and deep rumble at low RPMs which transitions into that mid-range howl the Ford 4.6L's all have and then the higher pitched scream from the F355 at the top of the range. :)

so by your methodology....i drive a pissed off Ferrari :tup:

i can dig it :icon17:

No...The hiss will come from any test pipe...and to answer one of the posts above me, its not being caused by a particular design flaw, its actually a harmonic resonance (think, frequency) that caused this sound at different rpms. I went threw a long drawn out process and the sound while being caused by test pipes, could almost be felt in the area where most X/Y configs meet. It was very odd, but that resonance was definitly caused by the test pipes.

Usually, between 2-3k while on the gas you can get a hiss/metalic zing/flutter type of sound, very very annoying in my book. Also, on decel during those same rpms, its just a straight hiss...

When I changed from the berk non-res test pipes to the GTM resonated ones it dramatically reduced the sound. In fact, I dont get that rattle on accel anymore, just a slight hiss on decel around 2500rpms.

From what I can tell, it may be possible to kill the sound all together by using those FI pipes that had a HFC & resonator all in one...I also heard that a true-dual exhaust with no connection (h/x/y) doesnt make the sound either. But it also doesnt make good power compared to a nice X setup.

all i know is that i hope that the cbe + long tube headers will create bigger and larger power gains vs. cbe + hfc/test pipes :D

and ofcourse have a sexier RAWR to the sound note