try this its called stop the hop package from steeda http://www.steeda.com/products/cobra_stop_the_hop_package.php
if you're looking for a kit i'd go with this
http://www.stangsuspension.com/store/comersus_viewitem.asp?idproduct=224
http://www.stangsuspension.com/store/comersus_viewitem.asp?idproduct=224
jiz material: Maximum Grip Box, 2003-04 IRS Cobra
Maximum Grip Box for 2003-04 Cobra with IRS
The MM Maximum Grip Box includes what you need to bring the performance of your IRS-equipped Mustang Cobra up to the same high level that MM parts have done for the solid-axle equipped cars. The MM Maximum Grip Box is quiet and composed enough for a street car, yet fast enough for the track.
This box includes the following parts:
* MM Strut Tower Brace
* MM K-Member
* MM Front Control Arms w/ urethane bushings
* MM Front Coil-Over Conversion Kit
* MM Adjustable Tie-Rod Ends
* MM IRS Subframe Bushings
* MM IRS Delrin Rear Lower Control Arm Bushings
* MM IRS Delrin Rear Upper Control Arm Bushings
* MM IRS Sway Bar End Link kit
* MM Rear Coil-Over Conversion Kit
* MM XL Series Full-Length Subframe Connectors
* MM Caster/Camber Plates**
* MM Aluminum Steering Rack Bushings
* MM Aluminum Differential Mounts
* MM IRS Rear Adjustable Tie-Rod Ends
* Hypercoil front and rear Coil-over springs
* Solid steering shaft
* Urethane front and rear swaybar bushings
* Urethane front swaybar endlinks
* Oil filter relocation kit
Maximum Grip Box for 2003-04 Cobra with IRS
The MM Maximum Grip Box includes what you need to bring the performance of your IRS-equipped Mustang Cobra up to the same high level that MM parts have done for the solid-axle equipped cars. The MM Maximum Grip Box is quiet and composed enough for a street car, yet fast enough for the track.
This box includes the following parts:
* MM Strut Tower Brace
* MM K-Member
* MM Front Control Arms w/ urethane bushings
* MM Front Coil-Over Conversion Kit
* MM Adjustable Tie-Rod Ends
* MM IRS Subframe Bushings
* MM IRS Delrin Rear Lower Control Arm Bushings
* MM IRS Delrin Rear Upper Control Arm Bushings
* MM IRS Sway Bar End Link kit
* MM Rear Coil-Over Conversion Kit
* MM XL Series Full-Length Subframe Connectors
* MM Caster/Camber Plates**
* MM Aluminum Steering Rack Bushings
* MM Aluminum Differential Mounts
* MM IRS Rear Adjustable Tie-Rod Ends
* Hypercoil front and rear Coil-over springs
* Solid steering shaft
* Urethane front and rear swaybar bushings
* Urethane front swaybar endlinks
* Oil filter relocation kit