egr delete pipe

Ihave recently fitted a psi powerbox tuning box to my 90bhp octy and am VERY impressedby the power increase as wellas the fuel consumption.Ihave a pipercross panel filter fitted and recently cleaned out my egr valve which was full of 140,000 miles worth of crud.Ive seen an egr replacement pipe for my car ,so do you think it would be worth me fitting one of them?All my driving is done on A roads and motorways so its never used for trundling round town so would it make any difference to mpg? thanks in advance.