Turning the Coupe in WIP: Model Cars Posted June 16, 2013 Cut the brake booster off and will be filling the hole. A 99 Cobra model will be giving up its Hydroboost brakes, drivetrain, and IRS/exhaust for this Coupe. With minimal angle change (not done here yet) the 99 Cobra exhaust fits nicely to the Coupe. There is a 99 Cobra IRS cradle sitting up there as well, behind the Corvette ZR1 wheels. The wheels will get a lip job and will be used on this build too.