Product DescriptionAstra GSI - Cavalier GSI - Cavalier Turbo - Calibra Turbo / 2.0 litre XE and Turbo Engines
1 x Vernier Pulley for C20XE and C20LET engines. To be used in place of OE pulley allowing exact timing adjustment to suit individual engine set up.
For early engines according to Engine Number breakpoint, as cam wheel size, tooth pitch and type are different.
This is for fitment on the Square type tooth type belts, which is roughly after later 1992 - Either check your Pulleys or Engine number to be sure
- Late C20XE - After Engine Number 14142838
- Late C20LET - After Engine Number 14002394
NOTE: We sell as a single not as a pair because a popular mod is to advance the inlet cam on the C20LET for extra gains.
We Advise Professional Install and set up also Thread Lock all Bolts and Check Regularly for Tightness.