Straight through pipe from midbox

[PugRory]

Looking at getting rid of my backbox and getting a straight pipe from the mid box on my 1.8. All I want to know is, will this effect fuel economy at all? will I lose any power?

[welshpug]

It will sound awful.

best keeping the rear box but removing mid box if you must, it's a lot easier anyway

[PugRory]

It will sound awful.

best keeping the rear box but removing mid box if you must, it's a lot easier anyway

Why would it sound awful? and it's something to consider

[powerandtorque]

It will be very loud running with just a mid-box on a petrol 306.

It works on TD's / HDi's as the turbo sort of acts as a silencer, but you don't have that and since the mid-box is stright through, it's going to be distinctly noisy. Remove your backbox, start the engine and give it a bootful of revs if you want to see what it'll sound like... and then re-fit the backbox when you realise that you couldn't tolerate that everyday (nor your neighbours!)

[bashbarnard]

Did a straight through from cat back on an old corsa once( was 17 at the time) sounded crap. Removed almost immediately

[RetroPug]

On this engine it'll likely be loud enough to get you pulled over.

[Jonny81191]

On my 2.0 16v, I had a decat to Bosal midbox (straight through design) to a straight through peco backbox. On the cheap you could use a HDi midbox as the backbox. It sounded awesome but could be driven quietly. Best of both worlds!!