If I was to change the backbox on my PPP Impreza to a HKS Hyper, would it be straight swap? My car has an STi Resoinator in the centre, will this be a problem with the HKS item?

 

bttt

 

I believe that you have to use the HKS centre with the HKS bb.

Mega_stream knows about this I think.

Good luck, MD.

 

You're right MD, the HKS Hiper BB comes with a mid pipe, won't fit onto a standard fitting centre pipe as the exhaust takes a different angle.

I would suggest you listen/go out in a car with a HKS on before you buy, they are loud on full throttle if you have a decat downpipe. Might not be to everyones taste.