I contacted them for a price quote and got a cost of $200 plus shipping there and back. I asked some tech questions about flow and performance increase and was told up to a 20% increase in flow rate. Would also have to do a valve job after it gets back.

I was wondering if anybody has had them do anything for them in the past and was it worth the money? Is there a good correlation of the increase in flow to the amount of power increase (torque or HP)?

 

thats good for just getting rid of any casting flaws and you get a good clean up, I have used them for some aluminum V 8 manifolds in the past.