Long shot , anyone got a q300 cat back for 2016 sti ?
 

Looking to change out my exhaust as now it’s finally back ( well it isn’t as back for injectors / map ) I’m not a fan of the sound at all. Standard bb and mid section. All uk stockists are out of stock and I don’t think timings will work to have it here in time. Don’t want to buy exhaust and remap again down the line when I could get it in before. I know it’s a long shot.

Youd likely get more joy asking on the UK 2015 STI owners page on Facebook.

Also, you don’t need a remap for a cat back.

hello mate hope your well.
been a nightmare, nobody has them in stock !!
oh really ? I presumed anything added or taken would need a remap ? Well that changes things as I’d be more than happy to fit as it has a current invidia 3” decat so an easy job really

and for that you need to be on Facebook ! Lol I’m not.

All well thanks buddy, hope you are too. Nope, cat backs are essentially “free” as they dont affect the mixture, so you can change them at will.

Ah if you aren’t on Facebook then that won’t work lol.

In which case I’ll get one ordered , think vip have them coming in this week. 👍

Just a thought tho Dan , if the cat back system is going from 2.5 ( standard ) to 3” will it not be then more free flowing and upset something the other end ?

No that won’t make a difference, it just means there’s less of a flow restriction. It’s the size of the downpipe that governs most of the flow characteristics of the engine, and the change in back pressure has an effect on boost dusty cycle. Therefore changing downpipes requires a remap, changing the cat back doesn’t.

top man , big help as usual tho chatting to you just seems to cost me money !! 😂😂. 👍

True, but isn’t it fun though 😂😂.