that mani looks like its got the same flaws as all the rest
wen it comes t,the secondrys fitting
they ev bunged the pipes ..inside the collector, instead of bulging it, so it fots ont oot side.
and, if they owt like the other types, there is a big protrusion into the collector
about an inch or so on the one I ed
this can only restrict flow
since I modded mine, it deffo seems t idle better, and sharper at top end too
butt, looks good, they soon change colour too