Hi, I'm installing the DW300C,
https://www.ftspeed.com/part/9-307-1...s#.XyaweyhKiUk
But getting conflicting information on the O ring and spacer requirements. Is it
- 3 O ring
- 4 O ring
- spacer + 1 O ring
- spacer + 2 O ring
Anyone can confirm on their own car what the right spec is?