S1 4.4L had no VANOS and 286 bhp
S2 & 3 4.4L had single VANOS (input I think) and so needed sump pickup but not dramatically different.
S4/Max/Coupe/SS/S5 gained the 4.8L dual VANOS which had the bigger sump and so could suffer from a haircut.
I think the guard we are discussing (Wolf) fits to the main engine block and not across the chassis so will be specific to the 4.8L at a guess but I am not the expert.
When I look under the S2 I am not inclined to get a cold sweat like I do when I look under the Coupe!
