Z31 -> S13 Front Coilover Conversion
This mod converts the stock shocks/springs of the Z31 into the S13 Coilovers. For those that cannot afford the cost of importing proper Z31 coilovers from Japan or the US.
What you need:
2x S13 Coilovers (Cusco Zero-1’s used)
2x S13 Lower Control Arms
2x SR20 Brakes / Hubs
2x SR20 Discs
How you do it:
Firstly: pull the front wheel off, then disconnect the steering arm and LCAs and remove the bolts from the engine bay holding the shock in and it all comes out.
What the wheel well looks like without a wheel or anything in it.
This is what you remove. Note the LCA isn’t connected, but remove that too.
Then you fit all the new parts together to form something that looks like the old stuff:
The new coilovers, with brakes, discs and LCA attached.
To fit the new coilovers into the old holes you need to file/drill the third hole. What we did was fit the new coilover into it, and 2 of the 3 bolts came through the existing holes. Then just took a rough direction and measurement to file to to get the last bolt to fit through.
The filing job i did on the hole.
All fitted and tightened up!
New bits in the wheel well.
And that’s it. Rinse + Repeat on the other side. Bleed the brakes, put the wheel back on and your done.
The full assembly that was removed, with the LCA this time.
The car initially had 27mm bolt-on spacers to get it to fill the guard out, now without the spacers:
Final look, without the bolt cover on the wheel.