Running Petrol without backbox

[Dump_Valve_Dreamer]

Folks i'm currently in the process of changing the exhuast from my mk1 and putting on one designed for a mk2, i got it for free (ITS REMUS). The pipe doesn't fit perfectly so my mech is going to take a look at the end of the week, Can i run my clio without the backbox for a week or so?

 

[JON13S]

ran mine for a month when it decided to part company with the rest of the exhaust. no problems except it makes your ears bleed