Swift Round Wire Linear Rate Bump Springs 800 lbs/in Bump Springs 5" Track Pipe addresses the

5" Track Pipe addresses the rear of the car by removing over 20lbs of polar weight on the vehicle

our spring will react to the road surface as needed

New hardware pack is required when replacing Alcon disc rings

2 bolt hole gasket

Works with all brands of downpipes/B-pipes

Swift Round Wire Linear Rate Bump Springs 800 lbs/in Bump Springs 5" Track Pipe addresses theRound Wire Linear Rate Bump Springs 800 lbs in Swift Bump Springs are made from a proprietary material. The same springs are used in Super GT, Formula Nippon, F3, F3000, Super Taikyu, IMSA, Pirelli World Challenge, Rally America, VLN, Le Mans Series, Formula Drift, and many other professional racing avenues.