Hardrace Rear Sub Frame Collars - Silvia S13/S14/S15 Haltech The Bosch 4

The Bosch 4

although still more than useable day to day

Our breakthrough injector design uses unique Swirl Generator Technology that improves atomization to deliver faster inlet temp cooling and uses less fluid to maintain inlet air cooling

depending on vehicle

Hardrace Rear Sub Frame Collars - Silvia S13/S14/S15 Haltech The Bosch 4Hardrace were created in 1998 with the sole purpose of designing and manufacturing uprated chassis components using the latest techniques and materials. Each of their components is designed to directly replace the factory part, allowing for pain free, bolt on fitment. CNC machined from high quality aluminium, these collars slot above and below subframe bushings to remove unwanted play and tighten up the handling.