Anyone upgrade the intake and runners on the J35 to the 3.7 intake off the MDX? How much additional power are you pulling? Did you need a tune for the car to run healthy or can you run it without a tune?

 

~ +0.5 - 0.8hp

 

Skip the 3.7 stuff and either get your oem throttle body ported or buy the billet 81mm throttle body from halferland performance. The only thing the 3.7 manifold is good at is low end torque, top end the 3.5 manifold is better especially so when both are ported and polished. If you really wanna switch manifolds go for a Y series manifold, flows better than both the 3.5 and 3.7. Do keep in mind a few modifications plus the addition of an intake spacer are needed.

(Here's my current intake manifold setup!)