How to install 5point harness sub belt in mk2? [Archive] - Toyota MR2 Message Board

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I just picked up a 5 point harness for my mk2, and im wondering since my sparco seat does not have a hole to for the sub belt to go strait up through if mounting under the seat, how do I go installing this? From my understanding in order for this to be scca and/or nasa legal it has to be directly under the seat? Also if i dont use the sub belt would it just be a legal 4 point or is a 4 point completely different from a 5 point?