are S5 TII and base model bodyparts interchangeable? like the front fenders and front bumper? talking to people about parts so I need to know for sure

yeah everithing will fit from a s4 to s5 or s5 to s4 just on the front bumper of the s5 going in the s4 you have to do a some adjustment and a little mod.but everything else youuld fit perfectly.

Edit: s5 Tail light won't fit the s4 without some cutting .

^ What he said

excellent, so S5 TII will fit S5 non-turbo... might have just fuond me a 30 dollar fender :)

Yes..