100% reliable, but it was made by F1 fabricator
not comparing xs power skilz to primary designs tho... for obvious reasons
there just is'nt much choice in k04 exhaust manifolds sadly
very much fingers crossed the xs-power one lasts for welly
and re egt's, log your block 112 when doing some power runs and think wmi is your friend!
should be std fitment on every remapped k04 imho, they run so so hot otherwise