Anyone have an opinion on the best backbox/downpipe combination for an STi/STi RA? According to the Dyno page, Scooby Sport backboxes and PE downpipes seem like a popular combination.

Thanks,

Max

 

At the mo, I am running a mongoose turbo back exhaust on my RA. Makes a marked improvment especially at high revs. IMO a superb exhaust if you can handle the noise.

 

BPM is one of the nicest sounding

I dont mean to upset cpofWales but the Mongoose has a fairly restrictive downpipe - its pretty much the same design as the OEM one not having a twin dump outlet, but rather a blanking plate = restrictive, its saving grace is that it is decatted.

You will get more power out of Scoobysport, HKS or BPM (HKS is expensive, and BPM is downright extortionate)