NAvi heads on my 4.6

[ANIMOSITY]

What intake can I use? I have a set on NAVI heads I got complete for $150 and Just wanted to know what Intake I should use? The car is a 96 cobra and Im running a D1 with 15 psi. Will the 99-up intake ,Aviator or the sullivan work. Thanks

 

[Ironhand]

There isnt one.

Pm is coming your way.

 

[AntiHeightPunk]

what ive learned about the navi heads is they flow better on the high end than regular cobra heads, so you will lose low end power
also you need a custom intake

 

[Ironhand]

what ive learned about the navi heads is they flow better on the high end than regular cobra heads, so you will lose low end power
also you need a custom intake

This is basically true. Navi heads work best on larger cubic inch motors then the smaller intakes. The problem is the port velocity is lower in the Navi heads with the larger port sizes. This is offset though when a larger motor is used. After all it was designed for a 5.4L.