[94cobragt]

I just got some ported FR500 heads, how well will these work with Forced induction vs. the 03/04 head?

 

[94cobragt]

Anyone have any input?

 

[tmhutch]

The 03+ have larger exhaust ports but it doesnt seem to make much of a difference. The FR500's are the absolute best of the 4.6 heads and will work very well, especially in ported form.

 

[na svt]

The FR500s have almost the same intake port as the 03/04 and an exhaust port identical to the 99/01 head. The 99/01 heads work great with FI so the FRs should be even better.

 

[94cobragt]

Thanks for the responses.

Will it matter if the exhaust ports are opened up on the FR500's, the heads i have have been ported already.

 

[tmhutch]

no

 

[Guido in Da Cobra]

Where did you get the ported fr500 heads?

 

[BlkSvo5.0]

I'm running race ported fr500s with 25psi and have no complaints