I'm looking at changing my backbox on my 02 wrx STI from the standard backbox to either the Ninja or ppp backboxes...

which one would you have guys...?

Any info greatly appreciated..

thanks

Andy

 

Andy - Before we talk about sound, what sort of look are you after.

The Ninja is typical Jap racer style, 4.5" slash cut and looks big.
The prodrive is, on the other hand subtle/standard looking.

Now, as for sound the Ninja is awsome, i have just the back box
and at full chat roars like a demented banshee with a nice deep rumble
at tickover.

The prodrive will not give the same sound as i don't think it has been
developed to give accoustics, more for power delivery.

Have you considered the Scoobysport system ?

Rob

 

Ninja BB is the way to go. And it gives u more middle and upper range kick. The straight format makes the exaust gases leave more quickly, so turbo spool up is increased.

 

i have a bugeye WRX PPP, obviously it had the prodrive PPP backbox which is a nice looking exhaust, i have just changed to a ninja backbox and the difference is fantastic, took a day or so for the ECU to sort itself then wayhey!!!

its alot deeper but not as intrusive as a vortex or firestorm.

it also seems to have alot more midrange pull, and once over 5K it roars....

fantastic backbox!

 

I've had the standard STi box (too quiet), the TSL 4" Group N (nice and loud but I wanted more) and currently am using the TSL Firestorm (loudest yet) but it can be quiet when you want it to be, honest

Dave

 

Changed mine from the Prodrive Back Box to a Ninja and then De-Catted......Awesome except for this high pitched Ratlle/squeek noise at mid Rev Range.