revolutionaryconcepts
Active LVC Member
well give them a shot or dont, they have an unbiased money back guarntee if your not happy with them anyway so really nothing to lose, and sparkplug type does have a noticable effect on performance and fuel economy just not a very large one, except for these, these plugs can be used with a modified engine, the only mods you cant use them with is forced induction or anything that modifies compression ratios due to the fact that they dont yet come with variable heat ranges, bolt ons will be fine, not to mention the fact that the epa shut them down for 4 months while they varified their claims, they dyno tested 158 different types of vehicles with different types of engines and showed a substantial increase in fuel economy, engine torque output, and reduced emissions across every vehicle they tested, weve sold about 30 sets here at the shop and havent had one come back, as a matter of fact 9 of the customers wanted there cars dyno'd before and after the installation, so they have a pretty good track record thus far