I've only seen a front heat-collector on FJs and a single tube to the air cleaner. These frequently rust off, fall apart, or are left off after a manifold gasket job. You can fab one with thin sheet metal, if needed - just make a snout to fit the hose, and a section that attempts to collect heat off the exhaust manifold.
They're pretty pricey at the dealer, if you can still get them.
Colo Springs, CO
'78 FJ40, '89 FJ62, '98 4Runner