Hi there.
I can only comment on the older chassis design so might be talking cobbles with the new designs. But the original design was use a Rover 200 with the drivetrain from say the Honda type R or Rover turbo. In your case the Seat. Have they gone away from the single donor route now?
These are all consumable and would replace anyway as a matter of course during the build.
2 x Front brake discs - Vented VW/EXi £ 30.00 pr
2 x Rear brake discs - Solid VW/EXi £ 20.00 pr
1 x Set road/race brake pads for front calipers £ 20.00
2 x Rear wheel bearing kits £ 49.00 pr
2 x Front wheel flange / bearing assemblies £ 85.00 pr
Cannot use donor calipers???
2 x Willwood aluminium 4 pot (front) calipers £ 160.00 pr
2 x Single pot rear handbrake caliper assemblies (incs pads) £ 120.00 pr
I found that having a complete Rover assembey was point less. As to get it all working, all the pedals had to be chopped from the Rover pedal box anyway. All separate pedals.
Hydraulic pedal box assembly to inc
1 x Pedal box (inc clutch pedal, brake pedal & accelerator pedal
1 x Balance bar assembly
2 x 0.75 Master cylinder
1 x 0.62 Master cylinder
1 x Cylinder clevis connector
1 x Hydraulic fluid reservoir
1 x Mtr brake fluid feed hose
As for the donor. Can you not look for the Golf/Audi A3/Skoda? Even the 150BHP ones. Then lookout for a bigger turbo for it if you want more power.
Also, what's happening about the wiring loom? Do Marlin sell them for the car?