Manufactured by us in House. Our brand of high quality evo cam pulleys , Hard anodised and coloured middles , great for fine tuning you engine Purpose: - To correct timing after a head skim - regaining perfect timing & power - To correct each banks timing after using different thickness head gaskets - To reduce rotating mass, reducing strain and potentially net power gains - To dress up your engine bay Remember: One pulley per bank does not time exhaust/intake separately, this is for adjustment of the whole bank's timing. Specifications: - Brand new set of 2 cam pulleys - Adjust timing advance and retard 10 degrees BUT remember this is both intake and exhaust cams - Made with HE30/6082 grade alloy with hardened teeth - High grade adjustment bolts/hardware - Anodized center part with high quality anodizing of one of these color (Blue, Red, Silver, Purple, Gold or Black) - 24 month warranty from CDF Racing