First of all, I do not care about the insulating propertes of spacers. Runner length is what I want to increase...that's it. In my 3.8, 1/2 inch TB to intake and intake to cyliner head spacers would add approx 13 wtq, giving an 8% increase. This has been shown not to be the effect of the insulation properties of phenolic but from the increased runner length. These cars are NOT carbed or TBI, they use a SEFI system just like a focus. I did a search and it seems like no one has tried this on foci, has anyone worked on G10 phenolic and would be willing to make spacers for cost of materials? If they will, I will pay for the friggin things to try it on my own car. I will butt-dyno the darned things on my bone-stock car, and with 38000 miles of familiarity i think i'll have a pretty good idea of whether or not they work. I'd say an 8% increase in TQ for 100 bucks would be the most ridiculously cost effective ting to improve low end tq that anyone on this board has ever even dreamt of.