Product Details
Swift Springs Bulletproof Series Coilover Springs in 2.55" ID and 16" length are purpose-built for applications that put more stress on a spring than conventional use. Developed after years of research specifically to meet the unique demands of circle track racers, these 2.55" ID Swift Bulletproof springs are manufactured in Japan from proprietary H5S.TW high-tensile alloy steel with enhanced durability for the extreme loading conditions found in competitive oval track and stock car racing.
The Bulletproof Series represents Swift Springs' answer to the circle track racing community's need for springs that survive repeated high-stress loading cycles without rate degradation. All Swift Springs Bulletproof coilover springs use H5S.TW alloy for superior fatigue life, delivering consistent spring rates and predictable handling lap after lap when other springs would fail.
Why Racers Choose Swift Springs Bulletproof Series
- Purpose-built for high-stress circle track and oval racing applications
- Proprietary H5S.TW alloy delivers extreme fatigue resistance and rate consistency
- Engineered to survive repeated high-load cycles without rate degradation
- Fewer coils reduce unsprung weight and maximize usable shock stroke
- Precision-ground flat ends ensure even seating on the perch
- Developed from years of research with top circle track racers
Note: Swift Coilover Springs are sold individually. Select your desired spring rate from the options above.
Specifications
| PART # | SPRING RATE | USABLE STROKE | MAX STROKE | MAX LOAD |
| lbs/inch | inch | inch | lbs | |
| 160-2550-125 BP | 125 | 11.4 | 12.3 | 1,537 |
| 160-2550-150 BP | 150 | 11.2 | 11.9 | 1,786 |