ScoobyDoobyDom

Just fitted a H&S 4.5 inch rear box using my Magnex centre decat non resonated centre pipe. JESUS CHRIST!! HOW LOUD???!!! One hell of a difference from the PPP rear box!

Is there much/any difference in sound if using a resonated centre section?

At the moment im about to refit the original catted pipe section just to stop my ears bleeding on the way to work in the morning!

I like the tone and superb grumble but its just a tad too boomy.

Any ideas??

Scott.T

iTrader: (2)

with a TSL Group N rear box there is about 2dB difference between resonated and un-resonated with H&S resonated centre.

Jim_B

iTrader: (1)

I run a H&S downpipe, Magnex resonated centre and Magnex b/b. The system is very quiet in car. No droning or real vibration and was measured at about 90 db outside [ normal 45deg angle 4000 RPM, 0.5M from the pipe reading ]

Aztec Performance Ltd

iTrader: (234)

I have a Blitz Nur Spec on mine and its not too loud as I have a silencer and resonator in the centre section. Still loud though. I suspect it will be stupidly loud without the silencer in the middle (which helps keep it from being boomy or overly loud).

Bob

NelsonUK

I ran a H&S Decat D/P a H&S Afterburner non resonated centre pipe and *original* scoobysport Back Box......very loud but more importantly very very raspy I made 103.6 at Castle Combe noise testing and the sound level was still increasing I have since fitted a Ninja Resonated centre and it is much better on the ears (although it is still quite loud). The car does feel as if it has lost a little bit of 'zip' but nothing that I am prepared to worry about