3500/3900 VVT

 3500/3900 60V6 engines with Variable Valve Timing.

Image	Name	Price
	3900 TB adapter This adapter allows you to use a cable driven 5.3 or northstar throttle body on your 3900 instead of the fly by wire set…	$59.99
	3900 Header Flanges These flanges have an angled bolt pattern vs the 3.1/3100/3400/3500 heads that are straight up and down.  The 3500 …	$54.99