GSC Power-Division Nissan SR20DET Beehive Spring kit with Titanium retainers.
The all new GSC5051 kit features a redesigned, lighweight Titanium retainer weighing in at only 5grams, vs the OEM at 18grams! The Nano-Peened round wire Beehive springs will rev well into 9000+ RPMS on 35PSI boost. This kit drops in using your OEM spring locator/seat and valve locks.