It all depends on what you want to do.

I have a 4 point Willans harness and have been very happy with that.

Install wise, the two lap belts, you can put the eyelet through the stock seatbelt mounting holes.

For the 2 shoulder belts they are connected to a harness bar in my boot. There are a lot of options for these, but make sure the harness installed legally (CAMS) and won't just pop out under impact (some people bolt them onto the parcel shelf with no additional strengthening - looks good, works not so good) - it is there for safety so you want to make sure it stays in the car.

Legalities of driving with a harness on the road are a bit iffy and personally it is a pain in the ass to do it (you can't easily look over your shoulder etc without loosening straps). So make sure you keep the standard belts in.

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[COLOR="Gray"]550Nm off a 2L... Just wish it was in the dak dak...[/COLOR]