Introducing the new CORE RC Hi Response long springs for Off Road buggies. Developed by Schumacher engineers and high level drivers over a wide range of conditions, from low grip dirt to high grip carpet. These springs have been made to improve the responsiveness of the cars, compared to the alternative CORE RC and Schumacher Big Bore Springs. They feature less coils and have a thinner wire diameter. They also offer a handy weight saving, by an average 4 grams per pair over previous CORE RC Springs. For use on the rear of the Cougar Laydown, CAT L1 EVO and other cars using big bore shocks.