hi all

Was just wondering if anyone has experienced the difference in noise etc between a resonated and non resonated aftermarket centre section of 2.5" bore?

Ive got a mongoose back box waiting to go on and want a bit more volume but not loose the ability to talk rather than shout at passengers at motorway speeds

thanks

 

I initially had a H&S back-box on an otherwise standard system and the first change I made to my car was to replace the resonated centre with a straight through which increased the volume of my exhaust by a good 50%. Mine is a 3" system which I've subsequently continued with including sports cat, but I imagine the sound increase might be a similar proportion if you run a straight through centre section.

Tim

 

It is, i have a 2.5" system, with de resonated centre (H&S), sound differnce i would say would be nearer 25% louder, but 50% deeper....for the £85 or so you can get cheap one for its WELL worth the money IMO.

 

I have a nurspec S backbox on with a de-resonated straight through centre section on my 2007 STi and I need to shout at my passengers on the motorway!

Car came like this and I was wanting to decat the downpipe but Nurspec dont do a decat pipe - nor do they do a centre section to go with the spec S. I was considering replacing the spec S backbox with a nurspec R centre section and backbox. I take note the nurspec R centre section comes with a resonater in it. Interesting - I'd like to hear that combination. Either way you still have to find another suppier for the decat downpipe.

 

My H&S system is not intrusive at all below 3,500 RPM, cabin noise is odviously louder than standard, but its 1 notch on the radio louder, not shouting...recommend H&S highly for the decerning motorist....

2007 STI too, btw

 

2006 sti, H&S de-res centre 2.5", ninja2 bb, not to loud and helps bring out that burble, i would recommend have de-resonater on the hawk.

 

H&S from 2nd cat out all clean through....sounds just right..not too loud

 

i have scorpian suzuka full decat de res centre pipe 2.5 inch. its quite loud but unique sound,really like it. pops and crackles on over run. need to check the decibells before the next track day

 

definately big difference on my sti blob when i took the prodrive system off for a an afterburner. a de-resonated section makes all the difference.

 

not sure im after a huge gain in noise.
My last sti5 had an HKs hi power system and it was too loud above 65mph - sounded incredible through tunnels but in all other ways it was ridiculous - the cars used on the school run and on longer motorway journeys.

How much of a difference noise wise is there between an aftermarket centre section with a small bubble silencer and one thats just a straight pipe - such as the ones scoobyparts an scoobyworld sell.

I know I cant get the rumble without the thunder but Id just like it to sound like a scooby should without getting an account at superdrug for ear plugs or paracetamol!

 

ive heard that the mongoose back box i have is quite quiet anyway - it looks similar to the TSL group N and scoobyparts racebox silencer.

Also did a check on bubble silencers on old posts thats given me more info - should have done that before posting so I think i'll get a centre section with a bubble silencer on it.