So i have an s5 motor with a twin plate clutch and lightened flywheel.. But the flywheel has a built in counterweight..

The question. Im now putting a s4 engine into my car that i picked up for cheap and want to use this clutch. Can i just swap over the front s5 counterweight along with the lightened s5 flywheel onto the s4?

 

No, you need an S4 CW. Swapping over the front CW will not resolve your problem as the Actual Rotor weight is different too..

S4 rotors =10lbs
S5 = 9lb

 

so i guess im screwed? the flywheel that goes with the clutch has a built in counterweight for a s5...

 

I would like to add a question to his question. What flywheel do you use if you had S5 housings and S4 rotors. Not wanting to threadjack, but curious about my situation regarding a flywheel

 

does it matter if you use the s4 or s5 flywheel? as long as the counterweight is correct? (this is a question btw)