MikeS said:
2" or just under 2" is the standard size
go for 2.25 unless you doing some serious mods
My exhaust sistem is with 2" pipe all the way(I bought the hole complect for this downpipe) and for this I think for 2" sport cat...I have some other updates - K&N filter, restrictet airbox, pipes from Vectra diesel, I removed the EGR valve.Soon I think to do remap and with this I think to finish my engine tuning.
And now the big question is - what is the exact size cat for me - 2" or 2.25"?(my downpipe is decat and on 2")