4age 20v silvertop：Difference between Silver and Blacktop 20V 4AGE Engines

This is a guide for making a educated comparison between the 20V Silvertop and Blacktop engines with a description of the difference explained. Some smaller differences are not covered and there are also some differences between the first and second generation of Silvertop engines.

AIRBOX

– The Blacktop has a larger volume airbox. The other key difference is the Silvertop airbox has a horizontal split between the lid and the base, as such the bolts are wound from the top down. The Blacktop has the opposite, it also has the difference of having the lid hook in to the bottom of the airbox base before swinging closed and being clamped down.

CAM BELT

– Tooth shape (belt only): To reduce noise the Blacktop belt featured a slightly different shape teeth profile, this is on the belt only and the profile of the drive / driven pulleys(s) remains unchanged and thus is cross compatible.

– Belt length: To allow for the different cam belt tens...