now ive searched but only found info for the ls using this mod. my question is on using it on a b16 what needs to be done. is this a bolt in affair. or does it still require the step downs like an ls or what is required for this mod?

 

its probably easier to just buy the aftermarket girdle that is sold for the ls and just buy arp main studs for a gsr and then get the oem gsr windage tray pick up and oil pan. thats the easiest thing and most cost effective cause if you went with all gsr main caps and girdle you would need to have everythign line honed.