[TurboTravis]

My IS300 has a T66 with all supporting mods and 264 cams. I am upgrading to a SP77 and am going to ditch the cast manifold for sure, and from the little research i have done the next major restrictions are the head/intake. My questions are:

Which one is the bigger restriction? I assume it would be the intake and TB?

How does a ported NA head flow compared to a TT head?

What aftermarket intakes and TBs are available?

Any info would help. Thanks.

Travis

 

[TurboTravis]

Will a ported GE head flow as much as a GTE head?

 

[TurboTravis]

TB is the most restrictive period, ge head will flow close to a gte head but the real difference again is the intake manifold.

What options are available for intakes and TBs?