Improves Stopping Power. Improve the stopping power of your classic 5.0 Cobra by replacing that worn out 20+ year old power brake booster. A re-manufactured OPR power brake booster is a great and inexpensive way to bring your Pony to a stop. For your 2003 Ford Mustang Cobra. The right fit. Always. Tire Rack makes it easy when you shop by vehicle. Many owners take on this conversion to get better Mustang brakes, since the original brakes aren't known to be the best. There are also many more wheel options available for 5-lug Mustangs, which is an additional benefit beyond the better Mustang brakes. CJ Pony Parts sells many Mustang brakes for 5-lug conversions, making these conversions easy! Maximum Motorsports Manual Brake Kit Review Part number: MMBAK-10 i purchased a hydroboost setup from an 03 cobra and the only mod needed is to drill a hole for the locating pin (or cut the pin off) otherwise it lines up perfect, plenty of room next to the shock tower and the best part the Manual brake master cylinder conversion 1979-1993 Mustang Automatic or manual transmission pedal box Utilizes Strange 1.125" dia. bore master cylinder Lighter weight than factory power brakes Compact design allows for more space in engine bay Utilizes factory brake pedal 6.5:1 pedal ratio Kit Contents ITEM# PART# QTY DESCRIPTION Buy a 2004 Ford Mustang Brake Master Cylinder at discount prices. Choose top quality brands A1 Cardone, API, Centric, Dorman, Motorcraft, Raybestos, Wagner. Installed Cobra brakes, still can't stop. Going hydroboost. You really need about 16" of vacuum for the brake booster to work properly. I ended up going manual brakes. It was a bad idea, and only makes it mildly easier to stop. It's Cobra 13" brakes with the new required master cylinder Cobra Replica Chassis, Steering, Brakes and Suspension and Accessories. Shell Valley's Cobra Kit Car Replica chassis is built on a jig that features eight cross members and 2" X 4" X 3/16" main rails give you a super st