What is ProMaxx?

We are a family owned business that began in 2012 by purchasing the remnants of Patriot Performance and Alabama Cylinder Head Exchange. We specialize in all types of cylinder heads, from diesel to performance. Our mission is to provide the best performing cylinder heads on the market, at a price that cannot be beat.

How much do the promaxx heads cost?

I have the ProMaxx 190cc, 64cc combustion chamber heads on my 350. On Jegs they were only $773 for the assembled pair, when on Summitracing they were $900 something.

Are assault heads any good?

Not seeing how assault heads would be better. The heads he’s talking about are made by promaxx, and from all the reviews and articles i’ve seen, they make some nice heads. Their 185cc heads out perform the dart shp 200 heads and comparible edelbrock heads.

Can 64cc heads be used on 450 hp engines?

Speedway Motors sells a budget 64cc head as well in both straight and angle plug versions. I have seen and used the straight plug heads and no issues on 450-500HP engines but nothing beyond that and no boosted applications either.

How much does a 200cc head cost?

They sell them at Summit and Jegs and other places for about $800 and they flow about 270cfm with 200cc runners. Obviously they are not AFR, but there have been more then a few dynos with these heads and they have made over 500 on a 383 or 400sbc.