Yeah the sound you get when you take it off or have straight intake is the turbulence through the intake.
It then sounds "tough" but it slightly slows air intake and thats why we have them.
But if you have straight intake and high flow filters the gains out weigh the small losses you get from taking out the resonators.
Don't know which one is "BEST" but i got the Skunk2 Plemun Spacer becasue it is the easiest to put in.
Just do it yourself with this http://forums.nicoclub.com/zerothread/274245 This guy has V1.0 you would get V2.0 (easier to put in)
Call Adam from http://www.999automotive.com.au/contactus.html (07) 3272 9992
Because i didn't reset my ECU after i put the mods on it took about a hours worth of driving before the computer had optimized it's self with the mods. When i put the JWT filter on the sound change was instant.
"Is it worth it?"
Is any of this stuff we do to ours cars worth it?
I don't think so
But i like to do it and that's what it's all about
Because the Z-tube is plastic heat soak is not bad at all and some people don't put the heat sheild on over the pod filter and that then sucks heaps of hot air in.
Skunk2 spacer is the easiest to put on.
Don't know about the high flow cat (look under the car does it looks differnet to others?)
Strut Brace then ECU upgrade is the next thing for me
My body kit looks good "Ken Stlye"
Custom paint or Turbo/Supercharger will be on the list if money comes my way.
You will not get the whitlsing sound from the K&N drop in filter. Combo of the spacer and JWT on my V35 was a total of 15kw gain to the wheels. But I do need to re-tune the ECU to get full benifit from my mods.
Watch my vid to hear the JWT filter with Z tube and Spacer.
I hear that it works by you pressing 20% down on the peddle and it does 30% more so it "feels" like your zipping around.
But thats just what i hear don't know if its true
it's not lifters?
drivetrain?
is nothing loose?
i was a fool and didn't lock tight my plemun blots and they came loose.
Could be lots of things. Video would help
Wonder if this would make a difference
(The “Sprint Booster”, is the perfect solution to solve the laggy of drive-by-wire system)
http://www.999automotive.com.au/products/sprintbooster/sprintbooster.html