When it comes to late model performance parts, nothing beats a bolt-on and direct connection components. Especially when they improve performance with a hotter spark like these new MSD Blaster replacement coils. The square E-coil is designed with improved materials and winding to produce a stronger spark, with a 40,000 volt output in a 83:1 turn ratio. MSD Ignition warrants its products to be free from defects in material and workmanship under normal use, if properly installed, for a period of one year from the date of purchase.