http://www.prewittracing.com/modmotor.htm

 

King James,

It doesn't seem like a bad investment for up to 60 added horses if you've got the money.

I would inquire about warranty and recommended "shorty" headers to match the outlet ports.

 

Need to see it to believe it. Sounds too good to be true. I think you'll gain 25-30hp or so, but not 60hp. If u want proven performance, get blown. My 2 cnts....

 

I am already getting the headers. I am going to get them with the tax refund in the spring.

 

What are the flow #'s on the heads before and after?

 

Keep in mind that this is heads AND a new cam grind. I would want to see the proof first, but gains like this are not out of the question.

Some of the 5.0 heads show 45-50 at the wheels with stock cams.

 

I saw that they get new cam grinds. However, won't one need a new chip for the increased cam grinds and fuel needed? Also, one has to assume that that the upper and lower truck intakes are not restrictive. If they are, they would need to get ported? Maybe combined with other mods, but by itself, it makes it questionable. Yes, a 60 hp might be attainable on a mustang application, but on a truck, there's some variations. Just my 2 centavos.