Guys,

I've bought a backbox with a 3" bore, my current centre section is 2.5", I want to fit the backbox to make sure I'm happy with how it sits etc before I commit to a 3" centre, but I'd also like to run it so I can get an idea as to the noise level and whether I'll need a resonated centre or not.

Is this possible to do? Will the flanges even line up?

 

i tried to pair up a 3" nur spec back box to a standard sti centre pipe but no luck

 

If you just want to fire it on to hear it, patch it up with exhaust cement for all of 5 mins whilst you rev it. What back box did you go for?

 

OK guys thanks, it's a Miltek meant for a hawkeye, I've had Miltek's before and they've never been loud, but I'm not sure on this one given the size of the backbox (will stick a pic up later), the plan is to run it with a full 3" sportscat and centre, but I will be running it on a 3" decat tapering to 2.5 with a 3" centre section (with Grimmspeed adapter) up until some time next year when I get the sports cat.

I think I might just take a punt on a 3" non resonated centre.

 

I had a milltek full 3" turbo back fitted to my STI, I didn't think it was that loud and didn't really like it. Can link you a video if you like?


My car - video by the last owner.