JEGS Super Heavy Duty Flexplates are SFI-29.1 approved for drag racing and made in the USA. The .160'' thick plates are CNC machined from 4130 chromemoly steel. The 1045 Steel ring gear is heli-arc fixture welded for precision. Weighs approx. 2 lbs. more than stock for more inertia on launch to improve reaction and 60' times. Final assembly is zinc dichromate plated for a long lasting appearance and to help ward off any degradation from the elements. A final 100% inspection is performed before any flexplate is placed in the packaging to assure total customer satisfaction. Made in USA.