Adjustable Vernier Cam Pulleys
for
Nissan Pulsar GTiR 
Nissan 200SX S13 S14
SR20DET Engines
 
BLOX Pro-Series cam gears feature a super lightweight design with the core CNC machined from 7075-T6 billet aluminum.
And Titanium gear ring for maximum strength and durability.
Each gear has laser etched timing marks with +/-10 cam degrees of adjustment and feature proven 6-bolt design.

Professional Installer is Highly Recommended (No Instruction Included)