Anyone know of any 'quiet' back boxes that don't restrict flow.

Is the HKS dragger back box quieter than my TSL 4" Group N back box....

 

Best off going for a Prodrive backbox

 

I believe the Subaru WR Sport backbox is good and pretty quiet too - ask EVOJKP - he has one. Also believe the Prodrive box is only available as part of the prodrive pack.

Brian.

 

I am trying to sell my WR Sport backbox if you are interested as I now have PPP. Both the WR and Prodrive units sound the same to me and the only visual difference is WR Sport has an oval tailpipe whereas the Prodrive one is round.

 

Dave, grab the WR Sport BB that is being offered, I've got one fitted to mine, nice burble that you can hear but isn't to intrusive in the cabin, AFAIK the PPP backbox is the same as this just a different tailpipe, and the bonus is it's warranty friendly.

John.

 

Dave, If you're swapping your exhaust, I might be interested in buying your TSL back box. Mail me.

cheers