dvs71990

Im putting my motor back together on my S4 na, Removing all emissions. Can I swap the center iron with an s5 na to avoid having to block off the egr on the s4 one?

arghx

iTrader: (3)

are the primary port runners (at the LIM mating surface) the same shape between the two? I know on the s5 turbo they are not.

dvs71990

they actually do look the same but I wasnt 100% sure

RotaryRocket88

iTrader: (7)

The intake port locations (and sizes) on the irons are the same for S4 & S5 NAs, but the ports used for emissions (below the intake ports) are arranged differently. Offhand, I think the S5 has the port air path located on the center iron, while S4s have 2 on the front & rear irons. Of course, if emissions aren't a concern, then that part doesn't really matter.

dvs71990

Thanks a lot.