Thanks guys.

I doubt it'll be the exhaust blocked as its a huge mongoose and the antilag would clear a dead body if it was stuck up there! lol. Although my dads V6 mondeo had a blocked cat once and that was SERIOUSLY slow. The Cossie is still producing 380 at 5000k. Worth a shot tho, I'll rod it to make sure.

I swapped the exhaust cam back to the standard one this morning. Its going back on the rollers on monday. hopefully it'll be sorted so they can finish the mapping!

I'll let you know what happens

Paul