?I failed my NCT
(Irish version of MOT) last week on emissions. I failed about 3 years ago and i put on an XS Power hi flow car and it went through fine.So, 2 years after that, all still good until this year.
My own fault really because car has been running very rich and also had a miss that i never got to the bottom of. So, probably damaged cat myself 
Anyway, want to get a car section so that i can it welded in.
Various sizes available but i am away at the mo and so can't get to the car til prob Friday. But, wanted to get the cat ordered asap.Last week after the NCT, i very roughly measured it.
I think the pipe diameter is 3" and the length of the main cat section approx 9-10cm. And then was hard to measure the end angled pieces but was guessing approx 5cm each end. Could anyone verify these measurements
TIA
Rob