99 intake manifold

[Rotoe Wash]

Anybody install a 99 or newer intake manifold on a 90-98 4.0? I read that the plenum of a 99 and later have a larger plenum and suppose to give you another 15hp.

[brokenujoint]

if you did a stroker kit that needs more fuel, got larger injectors for the fuel, did the 99+ intake for the air needed for the fuel and did a larger throttle body then yeah i'd say you'd get 15hp from the intake alone. with out all those things and just throw on the intake, you'll get a few but not much.