i got a s4 with a s5 front bumper and im thinking of adding the s5 fog lights to keep it looking stock'ish. now i know the s4 does not come with standard plug for the fogs so my question is can i just hook them us as if they were aftermarket like hooking up a relayand ground and toggle switch? if it worth it secondly or should i just go with some aftermarket hella or piaa fogs???

 

I plan on doing this soon as well. It seems like most people say it's not worth the trouble of putting them on our S4's, but I really like the look of the stock S5 bumper and fogs, so I'm going to hook them up somehow. I read a thread about this a couple weeks ago and someone mentioned buying a foglight wiring kit instead of custom wiring everything. I looked into it and I'll probably go that route. Check Summit Racing or wherever and they go from $20 to $60ish for the fancier kits. I'll probaby get a different switch so it matches my interior better, but the kits seem to really simplify the process. This thread might help too.

https://www.rx7club.com/2nd-generation-specific-1986-1992-17/s5-fog-lights-rare-write-up-install-s4-938172/