4 point harness

Hi i want to fit a 4 point harness on my car and i need to know how do i go about doing this? i don't really want to take out the backs seats but i don't use them. Could i take out the rear seat belts and replace with the harness? i was thinking of this one

http://www.demon-tweeks.co.uk/products/ProductDetail.asp?cls=MSPORT&pcode=SAB901118E

It all depends if you want the harness to actually work as it should or for looks!!! If you want it to work then the shoulder belts should never be mounted down to the floor or off at an angle, thats why they are mounted to the roll cage on the seat bracing bar slightly back and down from the upper holes in the seat.

If you want a harness I can get very good deals on Luke equipment.

You also want ones with ASM (anti submarining). This allows one side to stretch longer than the other, hence twisting your torso just like an OEM seatbelt does. This will prevent damaging your neck.

You also want ones with ASM (anti submarining). This allows one side to stretch longer than the other, hence twisting your torso just like an OEM seatbelt does. This will prevent damaging your neck.

ASM afaik is the front belt that goes between your legs, I don't know of one harness that stretches, I may be wrong though.

Just checked my car and i think it would look more neat if i just take the back seats out and connect the harness to the existing rear seatbelts

ASM afaik is the front belt that goes between your legs, I don't know of one harness that stretches, I may be wrong though.

You're right ASM is that too, it is any device that prevents "submarining".

Having a strap run inbetween your legs is the most common way of achieveing this.

Schroth have created another way where one side extends further than the other in a crash (via their brakable tab sewn in the belt), they are the only manufactuer to do this, check out Schroth ASM in the follwing link)

http://www.schrothracing.com/main/Engineering

IMHO I would only use a 4pt in a car with rollover protection (cage or rollbar), without this protection a 4 pt harness will hold you upright, in a roll situation, the roof may come down on your head, where as an oem seatbelt allows side movement for the person to avoid this.

Having raced bangers for 3 seasons with speedworth I can tell you that a decent 4 point will stop you hurting yourself at higher speed than you may think, I have been put into a railway sleeper at over 60mph and followed in by large cars , granadas/jags etc, aside from nice bruises from the belts no ill effects.

I would def educate yourself on the issues of fitting a 4pt to a street car before fitting them, this thread is a start.

http://www.supraforums.com/forum/showthread.php?t=495017&highlight=harness+asm

In car safety is not something you want to mess with without understanding what you're doing

neck brace!!!!!