I bought my 95 RA with its current exhaust setup:
HKS 2.5in Decat downpipe
Magnex straight through center section
Scoobysport backbox

For various reasons, I'm trying to quieten it down a bit! I guess the backbox has the biggest effect on the noise... any recommendations?

 

get an insert made ?

 

How about a Blitz NUR spec?

















only joking, how much do you want? keeping the decat and going standard Sti backbox would be an idea. Is it still on the std ecu?

 

It's been remapped and is running about 1.1bar. Is the standard backbox restrictive?