difference between a t3 and a t4 footprint

[badass]

Does anyone know how to tell the difference between the two?

[Lump]

http://www.google.com.au/search?tbm=isch&hl=en&source=hp&biw=1080&bih=467&q=t3+t4+flange&gbv=2&oq=t3+t4&aq=2&aqi=g7g-m3&aql=&gs_sm=e&gs_upl=2672l9734l0l14953l5l5l0l0l0l0l421l1640l2-2.2.1l5l0

[MrMayhem]

This thing is both T3 and 4
the bolt holes shoudl give you idea of the shape ..... t3 is the rectangular shape the T4 is nearly square

http://www.racingpartdepot.com/media/06/a20792912ee00c403b8a1e_m.JPG

[badass]

cheers guys im crap at internetz