I have the '98 Cobra 13" front brake kit with stock brakes at the rear and the stock MC. No problems whatsoever and the Cobra front brakes are light years ahead of the stockers.
I think Aerospace are telling you a load of BS. It sounds to me like you need more bias towards the rear brakes and a proportioning valve should achieve that. If you still have the stocker, maybe replacing it with the Cobra unit would work.
I think Aerospace are telling you a load of BS. It sounds to me like you need more bias towards the rear brakes and a proportioning valve should achieve that. If you still have the stocker, maybe replacing it with the Cobra unit would work.
When I had my Mercury Sable and was running 13" cobras in the front and a 11.6" vented setup in the rear versus my old 10.9' non-vented. It worked really well and flawlessly. Although, I wanted some more braking power in the rear. I used a Bias Plug -- Sold at SHOSource.com. It would basically add more pressure to the rear brakes. Now beware, changing the proportioning of the pressure can cause you to skid in panic stop events. I would ONLY recommend this modification to a vehicle equipped with a minimum of ABS in case of a wheel lock up stop.
I was also considering an adjustable prop valve to put more bias to the rear. I'm still running stock gear on all 4 corners, with new disks and pads on the rear. I'm really disappointed with the ineffectiveness of the rear brakes, but I don't see a need to upgrade to better braking hardware, since it doesn't seem that the stock gear is actually getting used much! That led me to the idea of an adjustable prop valve, so I can dial in the rear bias that I want.
I'll probably add that in the spring, when I upgrade the front brakes (they need replacing anyway).
Sounds like Aerospace is pumping air up your skirt about the rear kit, IMHO.
I'll probably add that in the spring, when I upgrade the front brakes (they need replacing anyway).
Sounds like Aerospace is pumping air up your skirt about the rear kit, IMHO.