i have a UK turbo with standard downpipe & std centre section & a powerflow backbox fitted, car has a nice note to it without it being annoyingly loud on motorway. pretty certain the pishflow backbox is more or less a straight through box

i have a RCM downpipe (heatwrapped), a straight thru centre section and an std STI backbox

but will it become annoyingly loud with these fitted?

 

I think by having the sti backbox on (even with the mods) it shouldnt be too loud due the backbox being more or less a baffle type design and not straight through one..but if you decide to use the powerflow box...that, i think will be too loud...will sound wicked though...
I had a Turbosmart ss back box on my bug....was probably the best back box ive ever heard...everything else was stock...damn that was deep as hell.....at idle you could feel it in you chest.......was awsome thru tunnels...specially betwenn 2900/5000rpm ...but on a highway it was tiring....especially for back seat passengers...depends on what you ultimately require.Had to sell the box as got pulled over by the fuzz...2points and £30 later......

 

if the STI box will still keep it quietened down then that should be good enough

i dont want it overly loud as its not overly fast lol

 

I cant really comment. Mine is 109db's at 4K

 

Pardon

 

pulled for what? there's nothing that they can do you for? apart from being anti social if done repeatedly at stupid oclock in the morning?

 

There is if you drive in cyprus....and a "dirty harry" wanna-be pulls you over..........

 

lucky it wasnt a "bad lieutenant" wannabe or he'd be pulling something else!

 

its when the cats and mid boxes come off that the decibels start to rise dont think it matters too much really what back box you have if the afore mentioned are removed!

 

Gambit, 3 inch straight through fella, you know you want to!

 

All the cats were on..!.the back box was a straight through 3 inch leading to 4 inch exit.....Damn loud too.......

 

well i replaced the centre section with a straight through and put on the STI rearbox, and the car is very quiet now in comparison! no in car noise at all

powerflow box snapped at the weld on removing, it was so high quality lol

 

This is mine mapped with a H&S Sports Cat DP, H&S Decat centre straight through to a STi BB.

Silent

http://www.youtube.com/user/53WRX#p/u/9/kOefkDiJePg

 

LOL!!