33mm-27.5 stainless steel valve head
This is our most affordable bang for your buck head option. These heads use oversize stock seat stainless valves. 33mm intake 27.5mm exhaust
-heads, valves, seats, springs, port work, flow bench testing, milling and combustion chamber cc testing
These heads flow 100-110 cfm and will put a any vanguard in the 50-60 hp range (assuming the rest of the engine is built for it )
Peak hp @ peak rpm for corresponding cubic inches.
model 30 (30ci)- peak hp @ 8500-10000 rpm
model 35 (35ci)- peak hp @ 7000-8500 rpm
model 38 (38ci)- peak hp @ 6500-8000 rpm
We reccomend our Tillotson HL 360 or 380 carbs for these heads.
Heads are made upon order and can take to 4-8 weeks to make
Heads are built using brand new castings and a core refund of 75$ will be refunded if the buyer send us a set of used model 38 heads