ignition blade and voltage regulator. Do these products work? Does anyone use them and recommend them?

 

i am using the sun auto x-power (ignition amp), voltage stabilizer and grounding kit. i did notice a slight improvement in throtle response and acceleration and a slight change in the sound of my exhaust. However, these are expensive parts and for this money you can buy parts that are better value for money like cams for example. everything helps though

 

thanks for the info